* class overrides equals() and should therefore also override hashCode()
* #1862 add modify user in process difinition list
* #1862 add pg-1.2.2 ddl.sql
* modify ScriptRunnerTest
* add updateProessDifinition UT
* modify updateProcessDifinition UT
* modify updateProcessDifinition UT
* modify mysql 1.2.2 ddl.sql&dml.sql
* add scope test to mysql in pom
* modify pg-1.2.2 ddl.sql