Bug 1032689 - Develop more semi-auto tests for the Telephony WebAPI.
Modified existing tests hangup_call method parameters
Bug 1032689 - Develop more semi-auto tests for the Telephony WebAPI
Updated docstring, removed unused imports
Merge pull request #152 from gnaneswar/Bug-1032689_Testcase_1_n_2

Bug 1032689 - Develop more semi-auto tests for the Telephony WebAPI.