Problem: GAE 1.7.5 doesn't run with certain javaAgents

As described at https://code.google.com/p/appengine-maven-plugin/issues/detail?id=10, there can be problems with adding the "noverify" flag when also specifying a javaAgent to the server.  Instead, we provide an option which will allow you to *not* add this flag, if it's causing problems.
Merge branch 'hotfix/server-noverify'