add test case for createSubscriptions method
add negative test for createSubscription method
add test method for getSubscription with mandatory parameters
add negative case test method for getSubscription
add test method for getHookSubscriptions method
add negative test method for getHookSubscriptions
add test case for deleteSubscription method
add negative test case for deleteSubscription method
Merge https://github.com/keizer619/esb-connectors
Merge https://github.com/keizer619/esb-connectors
Merge https://github.com/keizer619/esb-connectors
change create subscription proxy xml
change rest requests according to changes in proxy xmls
Merge https://github.com/pumudu88/esb-connectors
codes formatted