master-bc-1062

https://issues.liferay.com/browse/LIFERAYQA-7509

This removes the deploying of the portal-compat-hook when there are plugins.

The reason we are doing this is because the portal-compat-hook has a bug (https://issues.liferay.com/browse/LPS-44286) that is causing every test in ee-6.2.x that deploys a plugin to fail (which is more than 100 of our tests).

We talked with Jeffrey, and he mentioned that the only plugin that needs the portal-compat-hook is social office. Since the social office team has already set a property in their own test files that ensures that the portal-compat-hook is deployed, we wanted to just remove it from build-test.xml.