Sahara auto_security_group parameter added

The auto_security_group is now enabled by default for all Node Groups in all
Clusters. This is required for setting up a security group with a list
of TCP port for Hadoop operations.

Sahara does both creating and removig security groups automatically.

Change-Id: Ie862b541f468286bf4380f6e8d19014229beef91
Merge "Sahara auto_security_group parameter added"