SVC Monitor is not scheduling the vrouter for lbaas

A recent commit has changed the MODULE_VROUTER_AGENT_NAME from
'VRouterAgent' to 'Contrail-Vrouter-Agent'.

SVC monitor is still looking for the old value

This patch fixes the issue by checking for the module name of vrouter
using sandesh_common.vns.contants.MODULE_VROUTER_AGENT_NAME

Change-Id: I2c10d0a8a93a5cfc7e25ab2303f5c7a9ef2aeb6e
Closes-bug: #1385311
Merge "SVC Monitor is not scheduling the vrouter for lbaas"