Big Switch: Check source_address attribute exists

Check that the source_address attribute exists on
HTTPSConnection objects before referencing it since
it's not present on python 2.6 deployments.

Closes-Bug: #1316382
Change-Id: Id82e70f124cba73c33737099027b5c61aea713bb
Disable debug messages when running unit tests

Some runs started to fail due to large sub_unit.log files. We should
reduce their size. The easy way to achieve this is to disable INFO
messages that are filling our logs.

Change-Id: I6b3d3a4498593b6b5635d7eded4f9f88c84e5da0
Closes-Bug: 1316610
Merge "Big Switch: Check source_address attribute exists"
Merge "Disable debug messages when running unit tests"