Remove port setting from java code (it's in the pom)

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1501650 13f79535-47bb-0310-9956-ffa450edef68
SLING-2959 - ErrorHandlingTest intermitent failures in setUp

Be more conservative about the paths which are deleted in tearDown(),
especially avoiding deleting the whole /apps node.

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1501673 13f79535-47bb-0310-9956-ffa450edef68
Set up experimental travis build
travis: use mvn -q to try and complete the build on Travis