Currently for admin user, quota get-all method returning
all the quotas if all_tenants parameter is passed
irrespective of whether the flag is set to True or False.
This change fixes the issue by setting the correct
parameter type in quotas get-all method.
Change-Id: I6992c4b648bbbd01ce7d6ef4c53c031fa1f1c9aa
Closes-Bug: #1665109