Add the DSpace licence header to the CCMM test fixtures

license-maven-plugin checks src/** and fails the dspace-oai build without it. The check runs in
the verify phase, so it only surfaced once the unit tests stopped failing first.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: milanmajchrak

dspace-oai/src/test/resources/xoai-ccmm-academic-licence-test.xml

@@ -1,4 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    The contents of this file are subject to the license and copyright
+    detailed in the LICENSE and NOTICE files at the root of the source
+    tree and available online at
+
+    http://www.dspace.org/license/
+
+-->
 <!--
     An ACA (academic use) item.  DSpace computed open.access from the bitstream policies, but the
     download is gated behind the CLARIN identity form, so the feed must not call it open.

dspace-oai/src/test/resources/xoai-ccmm-approximate-date-test.xml

@@ -1,4 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    The contents of this file are subject to the license and copyright
+    detailed in the LICENSE and NOTICE files at the root of the source
+    tree and available online at
+
+    http://www.dspace.org/license/
+
+-->
 <!--
     XOAI metadata XML exercising the CLARIN-DSpace approximate-date convention:
     dc.date.issued is the literal "0000" ("exact date unknown") and the real

dspace-oai/src/test/resources/xoai-ccmm-clarin-access-test.xml

@@ -1,4 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    The contents of this file are subject to the license and copyright
+    detailed in the LICENSE and NOTICE files at the root of the source
+    tree and available online at
+
+    http://www.dspace.org/license/
+
+-->
 <!--
     A CLARIN item whose real downloadability disagrees with others/access-status: the licence is
     PUB and the file is fetched anonymously, while DefaultAccessStatusHelper called it restricted.

dspace-oai/src/test/resources/xoai-ccmm-date-shapes-test.xml

@@ -1,4 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    The contents of this file are subject to the license and copyright
+    detailed in the LICENSE and NOTICE files at the root of the source
+    tree and available online at
+
+    http://www.dspace.org/license/
+
+-->
 <!--
     Date shapes DSpace actually stores, plus two that no format string can parse.  Every branch of
     FormatDate has to produce a value xs:date accepts, or produce nothing at all.

dspace-oai/src/test/resources/xoai-ccmm-embargo-test.xml

@@ -1,4 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    The contents of this file are subject to the license and copyright
+    detailed in the LICENSE and NOTICE files at the root of the source
+    tree and available online at
+
+    http://www.dspace.org/license/
+
+-->
 <!--
     An embargoed item.  No CLARIN licence category is present, so others/access-status decides
     and has to reach the COAR embargo term rather than the restricted fallback.

dspace-oai/src/test/resources/xoai-ccmm-enumerated-date-test.xml

@@ -1,4 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    The contents of this file are subject to the license and copyright
+    detailed in the LICENSE and NOTICE files at the root of the source
+    tree and available online at
+
+    http://www.dspace.org/license/
+
+-->
 <!--
     "1920, 1932" enumerates two attested years; it is not a continuous range.  The migrated
     catalogue blob states the year the resource itself was created.

dspace-oai/src/test/resources/xoai-ccmm-minimal-test.xml

@@ -1,4 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    The contents of this file are subject to the license and copyright
+    detailed in the LICENSE and NOTICE files at the root of the source
+    tree and available online at
+
+    http://www.dspace.org/license/
+
+-->
 <!--
     Minimal XOAI metadata XML for CCMM crosswalk fallback testing.
     Missing most DC fields to trigger fallback behavior for required CCMM elements:

dspace-oai/src/test/resources/xoai-ccmm-no-identifier-test.xml

@@ -1,4 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    The contents of this file are subject to the license and copyright
+    detailed in the LICENSE and NOTICE files at the root of the source
+    tree and available online at
+
+    http://www.dspace.org/license/
+
+-->
 <!--
     A record carrying no dc.identifier and no others/handle at all.  identifier is 1..unbounded,
     so the crosswalk still has to produce one.

dspace-oai/src/test/resources/xoai-ccmm-restricted-flag-test.xml

@@ -1,4 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    The contents of this file are subject to the license and copyright
+    detailed in the LICENSE and NOTICE files at the root of the source
+    tree and available online at
+
+    http://www.dspace.org/license/
+
+-->
 <!--
     A PUB-licensed item with files that nevertheless carries others/restrictedAccess, which
     ItemUtils sets when a bitstream licence demands the identity form.  The flag outranks the

dspace-oai/src/test/resources/xoai-ccmm-stock-dspace-test.xml

@@ -1,4 +1,13 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!--
+
+    The contents of this file are subject to the license and copyright
+    detailed in the LICENSE and NOTICE files at the root of the source
+    tree and available online at
+
+    http://www.dspace.org/license/
+
+-->
 <!--
     A stock DSpace item: ISO 639-1 language with a region subtag, a type from the default
     submission list, no repository URL, and no access-status plugin.  None of the CLARIN-specific