BS-2584, fix message migration: progress was not set to 0
add intermediate throw for transitions
BS-2649, fix migration of catch event

Root cause: parentProcessId was not sed on catch event in 6.0.2 and message_instance were not deleted after handled

Changes: set the parentProcessId to rootProcessId + delete all message_instance already handled
fix progess = null on sql server
fix licence+javadoc
add check on what is it returned for transition migration
fix postgres delete message with handled = false, replace int by boolean
fix migraiton of transition: do not migrate deleted transitions
fix create/drop for postgres
add sql server in integration tests
add possibility to build using matrix
fix matrix configuration
fix sql server for transitions
Merge branch 'master' into FT158_AppsTracability