Wrapper for common HUB API queries. Upon initialization BEarer tocken is obtained and used for all subsequent calls
Usage:
from bds_hub_api import HubInstance username="sysadmin" password="blackduck" urlbase="https://ec2-34-201-23-208.compute-1.amazonaws.com" hub = HubInstance(urlbase, username, password, insecure=True) projects = hub.get_projects() 
