Add missing = to all suite Variables

Add missing = to all suite Variables

Use the following if we ever decide '} =' is better than '}='.
$ cd csit/tests
$ find . -type f -print0 | xargs -0 sed -i -E 's/^\| \$\{(.*)\}= \|([^|])/\| \$\{\1\} = \|\2/g'

FIXME: Add a corresponding check to https://gerrit.fd.io/r/13450

Change-Id: I73c516a0d7e475ff0986fd6515aaae10accd1a3a
Signed-off-by: Vratko Polak <vrpolak@cisco.com>