HORNETQ-1201 Avoid races resetting serverLocator0 and Activation.close(boolean).

Hopefully this will solve the intermittent failing tests due to
ClientSessionFactories left open.
Merge pull request #1069 from clebertsuconic/2.3.x

https://bugzilla.redhat.com/show_bug.cgi?id=963975 & https://issues.jboss.org/browse/HORNETQ-1195  connection stop will pause delivery on jms browser as well
Merge pull request #1071 from FranciscoBorges/2.3.x

HORNETQ-1201 Avoid races resetting serverLocator0 and Activation.close(b...
Bug 957126/HORNETQ-1186 : Fix some example related issues
Bug 965093/HORNETQ-1206 : Thread leak test failure with IBM JRE
Merge pull request #1075 from gaohoward/2.3.x-1206

Bug 965093/HORNETQ-1206 : Thread leak test failure with IBM JRE
Merge pull request #1074 from gaohoward/2.3.x-examples

Bug 957126/HORNETQ-1186 : Fix some example related issues