Handling restart argument boolean conversion
Handling restart argument boolean conversion

In fabric all the argument treated as string.
So for add_tor_agent_node and add_tsn_node task while passing
restart argument as boolean true or false it was treated as string.
handling the conversion with this commit.

Change-Id: I8bc0f3b2463e05694ca738c1a9fe101d4669990b

Juniper/contrail-fabric-utils,Juniper/contrail-fabric-utils