Add kill call into test_make_a_call teardown
Add kill_active_call and call in teardown of appropriate tests
Change case of imei in webqa-unagi json
Revert "Change case of imei in webqa-unagi json"

This reverts commit bb2884c6f72d1b96a029db6299593b4cf0e23930.
Merge pull request #374 from zacc/kill_call

Add kill call into test_make_a_call teardown
Merge remote-tracking branch 'mozilla/master' into issue_355
added assert for the contact in the contact API