Adding defensive checks.
more informative logging
rethrowing the exception
Adding more defensive checks.
addressing review comments.
read/delete cluster/feed/process in AuthorizationTest
warnings fixed
Merge pull request #103 from rostafiychuk/master

read/delete cluster/feed/process in AuthorizationTest
Merge pull request #109 from raghavgautam/master

Logging changes and adding fixing ELTest
Merge pull request #111 from rostafiychuk/warnings

warnings fixed
new test cases added, refactored