workload-automation: fix AEP regex

Remove unnecessary quotation marks in the regex and also support WAv3
config.yaml file in the WA_HOME.

Change-Id: Ifc015b493f2daccf31baa59136d8f14f82fa09c8
Signed-off-by: Milosz Wasilewski <milosz.wasilewski@linaro.org>
1 file changed