Merged r1593773 from tomcat/trunk:
In tests: allow to configure directory where JUnit reports and access log are written to.
This is useful for Apache Gump, where BIO, NIO and NIO2 tests in Tomcat 8 are configured separately.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1593780 13f79535-47bb-0310-9956-ffa450edef68