fix(#709): add missing org.springframework.http OSGi import in camel-cxf-all (#720)

CXF's org.apache.cxf.jaxrs.springmvc.SpringWebUtils references
org.springframework.http.server.observation.ServerRequestObservationContext,
but camel-cxf-all only imported org.springframework.web* (and other specific
Spring sub-packages), not org.springframework.http*. This caused a runtime
NoClassDefFoundError / ClassNotFoundException for that class.

Add org.springframework.http* as an optional, versioned import, consistent
with the other optional Spring imports in this bundle.

Author: jbonofre

components/camel-cxf/camel-cxf-all/pom.xml

@@ -59,6 +59,7 @@
             org.springframework.beans*;resolution:=optional;version="${camel-osgi-spring-version}",
             org.springframework.context*;resolution:=optional;version="${camel-osgi-spring-version}",
             org.springframework.core*;resolution:=optional;version="${camel-osgi-spring-version}",
+            org.springframework.http*;resolution:=optional;version="${camel-osgi-spring-version}",
             org.springframework.util*;resolution:=optional;version="${camel-osgi-spring-version}",
             org.springframework.web*;resolution:=optional;version="${camel-osgi-spring-version}",
             org.objectweb.asm*;resolution:=optional;version="${camel-osgi-asm-version}",