Eliminate duplicated LoopingCall and LoopingCallDone code

Bug 1307560 cleaned up some parts of this particular use of deprecated
code. However there is still one instance left in
trove/common/utils.py which needs to be cleaned out. This change
removes LoopingCall and LoopingCallDone from utils.py and references
the openstack code from loopingcall.py.

Change-Id: Ice69626d4e6cbb1186aba8d84cfd6109569eba8f
Closes-Bug: #1314766
Obsolete oslo-incubator modules - importutils

This change is part of a multi-part change set to handle obsolete and
graduated oslo modules. This change addresses import utils that is now
part of oslo.utils.

The file importutils is not being deleted because of dependencies
within oslo-incubator

Partial-Bug: #1380789
Change-Id: I8bd0275c2fb33fc3ebcea578a2746bfe755ce1e8
blueprint: retire-unused-oslo-incubator-modules
Fix timeout in test_slave_user_removed int-test

The test_slave_user_removed int-test polls to check that the
slave user account is removed, but doesn't currently have a time
out set. This means that a failure in this test causes the entire
suite to spin, and ultimately time out. Fix this by adding a 3 min
timeout to this test.

Change-Id: I5f869c7d3cb0587409b5a12a89ed673e57552b82
Closes-bug: 1399583
Clean up github references from docs

OpenStack hosts things in places that are not github. Also, it seems
that there is a big blob of unrelated readme in the README file.

Closes-Bug: 1399839
Change-Id: I70cc6772b50591c4b3badd6c92567a7a6541bacf
Updated from global requirements

Change-Id: I5bb8f18bda9da307e7a905e20b7acd0561b55b96
Merge "Clean up github references from docs"
Merge "Eliminate duplicated LoopingCall and LoopingCallDone code"
Merge "Updated from global requirements"
Merge "Obsolete oslo-incubator modules - importutils"
Merge "Fix timeout in test_slave_user_removed int-test"