Adding method comments. Removing unused methods. Optimizing redundant code.
Refactor AndesConfigurationManager - handle extremely rare config related exceptions inside, instead of delegating it outisde and cluttering code.

Conflicts:
	features/andes/org.wso2.carbon.andes.server.feature/resources/conf/broker.xml
Merge pull request #80 from hastef88/overall_refactoring_v2

Adding further review comments on my contributions upto now