Trigger builds on sub-projects  #501

Whenever a build is executed on develop branch, dependent projects need to be built to assure that they are not failing after changes to the main project.

For details on how to do this see Travis doc
Currently the dependency is:

• utPLSQL
  • utPLSQL-sql-cli
  • utPLSQL-v2-v3-migration
  • utPLSQL-java-api
    • utPLSQL-cli
    • utPLSQL-maven-plugin - once developed

We should build dependent project pulling sources of the develop branch of utPLSQL.
This way each breaking change in develop should be easy to capture in underlying projects.