upgrade of spring framework version to 3.2.11.RELEASE to resolve securit...

...y issues described in BZ-1110332 and BZ-1110329

https://bugzilla.redhat.com/show_bug.cgi?id=1110332
https://bugzilla.redhat.com/show_bug.cgi?id=1110329

it has been tested with drools and jbpm and do not cause any issues, no code changes where required - droolsjbpm-integration project's tests all pass (mvn clean install build).