chore(packaging): simplify bundle packaging

Simplify processing
  - remove version in tomcat directories used in various modules
  - deploy module: put bonita lib directory in the final tomcat server/lib/bonita
  folder for simplification
  - remove extra copies of jars and files

In addition, use maven pom packaging for the 'deploy-distrib-sp'module as
this module doesn't need to produce a jar artifact