Merge changes from origin/7.1

Merge changes from origin/7.1

98aff2b Fix caption lost issue related to focus changing (#12967)
af96612 Test using Tomcat 7 behind Apache proxy (#13302)
ad49fe3 Test using Wildfly 8 (currently CR1) (#13167)
6d8b9e5 Servlet test for push with default parameters (#13299)
d88e409 Added proper escaping to OptionGroup item icon URLs (#13310)
e680b8f Changed getAbsoluteUrl to use the correct escaping method (#13311)
fe6ea57 Release notes updated to describe #13310 #13311
ef208a6 Javadoc formatting fixup

Change-Id: I9cedc16c69b25cc89dd4e4a6812d29019e6e0e0a