Execution workflows loop infinitely on fatal errors with CM

[vholer]

If scale out/in workflows fail on a fatal error (e.g., VM fails to boot and is manually cleaned), the Cloudify Manager stuck in the infinite loop of retries.

	Timestamp	Event Type	Log Level	Operation	Node Name	Node ID	Message
	2018-01-04 20:45:41	Task failed	-	cloudify.interfaces.lifecycle.start	workerNode	workerNode_jmlkc1	Task failed 'cloudify_occi_plugin.tasks.start' -> Failed to run occi: F, [2018-01-04T20:45:41.693050 #21070] FATAL -- : [rOCCI-cli] An error occurred! Message: Net::HTTP::Get with ID["85dc1002-3764-45f9-950f-f4c22a57ad3e"] failed! HTTP Response status: [404] Not Found : "Instance with ID 114237 does not exist!" [retry 2463]
	2018-01-04 20:45:41	-	INFO	cloudify.interfaces.lifecycle.start	workerNode	workerNode_jmlkc1	Exited with code=1
	2018-01-04 20:45:39	-	INFO	cloudify.interfaces.lifecycle.start	workerNode	workerNode_jmlkc1	Executing ['/usr/local/bin/occi', '--output-format', 'json', '--endpoint', u'https://carach5.ics.muni.cz:11443', '--auth', u'x509', '--user-cred', u'/tmp/x509up_u1000', '--voms', '--action', 'describe', '--resource', u'https://carach5.ics.muni.cz:11443/compute/114237']
	2018-01-04 20:45:39	-	INFO	cloudify.interfaces.lifecycle.start	workerNode	workerNode_jmlkc1	Starting node
	2018-01-04 20:45:38	Task started	-	cloudify.interfaces.lifecycle.start	workerNode	workerNode_jmlkc1	Task started 'cloudify_occi_plugin.tasks.start' [retry 2463]
	2018-01-04 20:45:38	Task sent	-	cloudify.interfaces.lifecycle.start	workerNode	workerNode_jmlkc1	Sending task 'cloudify_occi_plugin.tasks.start' [retry 2463]

See 2463 retries of just checking something which doesn't exist anymore.