Vim settings can be done in your vimrc file, there is no need to add
them in each source files. Also if set incorrectly, gate (pep8 check)
will catch your mistakes.
NOTE: openstack.common files are left untouched because they should be
fixed in oslo.
Change-Id: I96fe6479e64a13766e7a974727405423a66cd496
Closes-Bug: #1229324