CFY-1363 use operation executor for determening task queue
CFY-1363 fix flake
CFY-1363 point to correct branch of dsl-parser
CFY-1363 fix dev-requirements
Merge pull request #73 from cloudify-cosmo/CFY-1363-executor-override

Cfy 1363 executor override
Merge branch 'master' into CFY-1574-relationship-ctx