implementation and tests to update parameters under settings menu
revert the small locator change
Fixed travis failures
added few more tests to validate the param's values under general tab
updated PR with review comments
defined an Exception subclass 'UnknownValueType'
Added few more tests
Blocked tests with bz id
added test to update param under foremantasks tab
incorporated review comments
Merge pull request #1111 from sghai/set

Implementation and tests to update parameters under settings menu