Updated openstack/openstack
Project: openstack/python-neutronclient  31653bd130529db630633cb2375fa7dca7d68a75
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Updates .gitignore

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

Change-Id: I9384015efdd1bc2a9bbfe6f25552cd909b155998
Closes-Bug: #1255876