fix lowercase for disable_flow_collection for vrouter
fix lowercase for disable_flow_collection for vrouter

Change-Id: Ife859ff284501bdf0b93ddc992a7e87c4c1fe991

Martin819/salt-formula-opencontrail,Martin819/salt-formula-opencontrail,pupapaik/salt-formula-opencontrail,pupapaik/salt-formula-opencontrail,Martin819/salt-formula-opencontrail,pupapaik/salt-formula-opencontrail,Martin819/salt-formula-opencontrail,pupapaik/salt-formula-opencontrail