Added some tests using the manager-test Web Service Application.
The application should be previously deployed in some glassfish
(standalone or cluster) using the couchbase manager.

There are four groups of tests:
-> blocking: Testing using 1 parent thread and two children.
   Very useful for non-sticky blocking testing.
-> refresh-update: 1 thread do a lot of session attribute
   updates.
-> create-delete: 1 thread do a lot of creation and deletion
   of sessions.
-> performance: 4 tests with 16 parent threads using
   different attribute sizes.

There is a special property for the test, the baseUrl where
the manager-test application is deployed.

The tests can be skipped or changed using normal parameters
in maven:

-> Skip tests for packaging:
   mvn -Dmaven.test.skip=true -o package
-> Perform only some group of tests:
   mvn -o test -Dgroups=blocking,refresh-update \
   -DbaseUrl="http://192.168.122.21/manager-test-NONSTICKY/SessionTest?wsdl"