- adding missing method
 - small update to new api
 - adding checklist example
 - updating task commands
 - additional modifications to make task commands work
 - fixing checkbox example
 - removing env creation
JBPM-4007 Making the TaskSummary serializable with JAXB

- Tests depend on the related kie-internal and kie-api commits
 - adding more command implementations
Merge remote-tracking branch 'origin/master'
JBPM-4007 Making the TaskSummary serializable with JAXB
Some Get* Command objects were returning null instead of the requested object
JBPM-4007 Making the TaskSummary serializable with JAXB
Fixing Get* Command objects
JBPM-4013 Create JAXB representation of the Task interface
jbpm-human-task: turned tests back on
BZ955574 - Switching to Advanced/Personal Tasks tab using PostgreSQL causes SQL Error