Fix getting EC2 and S3 urls in create_userrc

Invalid parsing of openstackclient output was introduced in
I03c17cfc9740c3eb257152c95d9c4f021db2c89e. Here command lines
was changed to get urls with no parsing.

Also default EC2_URL was fixed.

Change-Id: Ic46a9989321cf6310c56edeeb737c603a4f9c1ed
Merge "Fix getting EC2 and S3 urls in create_userrc"