Resolved Rabbit MQ Connecti on Problems during server startup & RabbitMQ
transport issue with contentType application/json

https://wso2.org/jira/browse/CARBON-14980
https://wso2.org/jira/browse/CARBON-14981
Merge pull request #20 from neelakishok/CARBON-14980

Resolved Rabbit MQ Connection Problems during server startup
Merge pull request #12 from wso2-dev/master

Merging latest changes