updates the pom with meta data service
remove unnecssary logs
Merge branch '4.0.0-grouping' of https://github.com/gayangunarathne/stratos into grouping

Conflicts:
	components/org.apache.stratos.metadataservice/src/main/java/org/apache/stratos/metadataservice/registry/CarbonRegistry.java
	components/org.apache.stratos.metadataservice/src/main/java/org/apache/stratos/metadataservice/registry/GRegRegistry.java

This closes #39