Remove default base_url value
Remove default base_url value

* For local stackstorm better to pick from env vars of action

armab/st2contrib,tonybaloney/st2contrib,psychopenguin/st2contrib,armab/st2contrib,tonybaloney/st2contrib,StackStorm/st2contrib,pidah/st2contrib,tonybaloney/st2contrib,pearsontechnology/st2contrib,pearsontechnology/st2contrib,psychopenguin/st2contrib,pearsontechnology/st2contrib,pearsontechnology/st2contrib,armab/st2contrib,StackStorm/st2contrib,pidah/st2contrib,StackStorm/st2contrib,pidah/st2contrib