Automatically renew the VSD API key
Automatically renew the VSD API key

VSD API keys are re-generated 5 minutes before the old one expires.  This patch
will try to get the new key 3 minutes before the old key expires, which should
be ~2 minutes after a new key is generated.

kmurthy1/nuage-kubernetes,kmurthy1/nuage-kubernetes,nuagenetworks/nuage-kubernetes,rushabh268/nuage-kubernetes,rushabh268/nuage-kubernetes,kmurthy1/nuage-kubernetes,nuagenetworks/nuage-kubernetes,kmurthy1/nuage-kubernetes,rushabh268/nuage-kubernetes,rushabh268/nuage-kubernetes,nuagenetworks/nuage-kubernetes,vareti/nuage-kubernetes,vareti/nuage-kubernetes,nuagenetworks/nuage-kubernetes,vareti/nuage-kubernetes,vareti/nuage-kubernetes