fixing https://issues.apache.org/jira/browse/STRATOS-486
adding tagging instances support in AWSEC2
appending root cause to the exception
fixing implementation code for  https://issues.apache.org/jira/browse/STRATOS-486
fixing pom.xml exports
fixing wsdls for https://issues.apache.org/jira/browse/STRATOS-486
fixing https://issues.apache.org/jira/browse/STRATOS-486
fixing service implementations for https://issues.apache.org/jira/browse/STRATOS-486
fixing wsdls for https://issues.apache.org/jira/browse/STRATOS-486
fixing service implementations for https://issues.apache.org/jira/browse/STRATOS-486
fixing rest service back-end for https://issues.apache.org/jira/browse/STRATOS-486
fixing to CLI for https://issues.apache.org/jira/browse/STRATOS-486