BS-9918 : Replace Bitronix by Atomikos in Tomcat bundle

- Replace Bitronix by Atomikos in bonita-integration-tomcat6
BS-9918 : Replace Bitronix by Atomikos in Tomcat bundle

- Replace Bitronix by Atomikos in bonita-integration-tomcat7
BS-9918 : Replace Bitronix by Atomikos in Tomcat bundle

- Replace Bitronix by Atomikos in all services & api integration tests, and in transaction project