Fix incorrect comparisions

The files changed in this commit had incorrect bash syntax in that they were
assigning variables (=) instead of checking if they were equal (==). The
incorrect checks were preventing the configuration of VLANs with the Neutron
ML2 plugin.

Change-Id: I4b54bb5c69cc836c22900bd7a966197e9c616076
Merge "Fix incorrect comparisions"
Merge branch 'master' of https://github.com/openstack-dev/devstack