Updated openstack/openstack
Project: openstack/neutron  2036019ec61a49dcf2a8b3afc4608e612a9bc879
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Updates .gitignore

To ignore swap files from getting into repository
currently the implemented ignores are *.swp and *.swo
however vim adds more swap files if these files exists,
so improving this with *.sw?

Change-Id: Ie1b458d2b862e6cf2552ae5be6c6178b72e960ab
Closes-Bug: #1255876