Update constants.py
Update constants.py

Added us-gov-west-1 to the TROUBLE_REGIONS constant.  Working with GovCloud is a different approach and by default will be left out of scanning to avoid excessive querying/processing and exceptions.
stackArmor/security_monkey,stackArmor/security_monkey,stackArmor/security_monkey,stackArmor/security_monkey,stackArmor/security_monkey