Expose stateVariables in REST API.
Store requestData from REST API under key "requestData" in state variables.

Previously requestData was stored under key "req".
Improve api docs.
Expose stateVariables in REST API.
Store requestData from REST API under key "requestData" in state variables.

Previously requestData was stored under key "req".
Improve api docs.
Merge branch 'rest-state-vars' of github.com:NitorCreations/nflow into rest-state-vars
Add updated state variables to actions.
Add integration test for state variables.
More unit tests. Fetching single instance returns also all state variables.
More unit tests. Fetching single instance returns also all state variables.
Merge branch 'rest-state-vars' of github.com:NitorCreations/nflow into rest-state-vars
Expose stateVariables in REST API.

Store requestData from REST API under key "requestData" in state variables.
Previously requestData was stored under key "req".
Merge branch 'rest-state-vars' of github.com:NitorCreations/nflow into rest-state-vars
Fix potential null pointer access in StateVariablesTest
reformat
Use constants for empty maps.
Package visibility for fields that are used by inner static classes.
include options for WorkflowInstanceResource are now constants.
Log warning if converting state variables to JSON fails.