Updated Unit Tests for JDBCConfig

Conflicts:

	src/main/src/test/java/org/geoserver/config/GeoServerImplTest.java
JDBCConfig was returning workspace specific services when global services were expected.

Conflicts:

	src/main/src/test/java/org/geoserver/config/GeoServerImplTest.java
Fixed vague and misleading javadoc
Fixed lack of filtering of ServiceInfo objects in JDBCConfig.