This commit enables user to update dpdk bond config
only when required using the flag UPDATE_DPDK_BOND_CONFIG.
This helps in avoiding disruption in ovs dpdk during ovs
agent restart or when there is a update in bond config.
Setting UPDATE_DPDK_BOND_CONFIG to true will have default
behavior.
Setting UPDATE_DPDK_BOND_CONFIG to false will disable
configuration of bonds after the first run and can be
set to true when required.
Change-Id: I4c8ec145c8f1c1c1b5f7a5201f792e040fdd89a2
a2f2e0418f