Joshua Harlow e501a565ae Handle case where oslo_db.tests has not been imported
It seems possible to use the connection_trace functionality
without having 'oslo_db.tests' be loaded so it seems like
the code here should be handling that module not being loaded
and the associated key error that is raised when it fails.

Change-Id: I6ef05ff83365ce0b86ec72a444e714f7a29c91c8
Closes-Bug: #1493675
2015-09-08 23:20:26 -07:00
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