test(engine): test cmmn task/stage manual activation rule

- adds failing test cases for plan item activation rules
- adds working test cases for plan item definition default activation rules

related to CAM-3169 CAM-3170
fix(engine): deserialize value in first command

if a serialized value is set, it can be deserialized in the same command
if so requested.

related to #CAM-3174
chore(qa): add spin classloading test

related to #CAM-3179
chore(spin-plugin): remove unneeded and failing test case

related to CAM-3176
chore(spin): set spin version to 1.0.1
fix(engine): change jobs process definition correctly

- add test for the change
- modify Job.xml wrong parameter

fixes CAM-3207
test(engine): test implicit update of empty JSON-serialized list

test case for CAM-3222
test(engine): sentry evaluation after containing stage completes

test for CAM-3226
Merge pull request #4 from camunda/master

Pull changes from upstream repo