Add negative_priority_presence and invisible_presence tests.
Fixed vcard tests.
Merge pull request #19 from arcusfelis/arc-presence-xmlel

Add negative_priority_presence and invisible_presence tests.
add some metrics tests
add R16 to supported otp versions
Fixed typo.
Merge pull request #20 from arcusfelis/arc-vcard

Fix vcard tests
Add tests for metrics web-services
Add BOSH test suite stub
Test BOSH session creation and termination
Test stub for interleaved requests
Always use a valid request ID
Fix interleave_requests testcase
Cleanup test group configuration
Add disconnect_inactive test stub
Configure server for disconnect_inactive testcase
Fix typo and indentation
Finish disconnect_inactive testcase
Include the inactivity group in groups/0
Make get_bosh_sessions backend agnostic