neutron-legacy: Consistently use `--config-file foo`

This change adjusts a few instances of `--config-file=foo` to
`--config-file foo` (no `=`) in order to make neutron command
lines more consistent and easier to match in sudoers/rootwrap
filters.

This is particularly useful for oslo.privsep, which needs to start a
helper command with the same `--config-file` arguments (see
Ia9675dff9232e0e987a836ecaf9e842eb5c3cb18).

Change-Id: I91fe18f66f3c3bc2ccd1ca8be91be2915ed3e3ec
diff --git a/lib/neutron-legacy b/lib/neutron-legacy
index 5e5207b..73123ef 100644
--- a/lib/neutron-legacy
+++ b/lib/neutron-legacy
@@ -297,7 +297,7 @@
 }
 
 function _determine_config_l3 {
-    local opts="--config-file $NEUTRON_CONF --config-file=$Q_L3_CONF_FILE"
+    local opts="--config-file $NEUTRON_CONF --config-file $Q_L3_CONF_FILE"
     if is_service_enabled q-fwaas; then
         opts+=" --config-file $Q_FWAAS_CONF_FILE"
     fi
@@ -524,7 +524,7 @@
 }
 
 function start_mutnauq_other_agents {
-    run_process q-dhcp "$AGENT_DHCP_BINARY --config-file $NEUTRON_CONF --config-file=$Q_DHCP_CONF_FILE"
+    run_process q-dhcp "$AGENT_DHCP_BINARY --config-file $NEUTRON_CONF --config-file $Q_DHCP_CONF_FILE"
 
     if is_service_enabled neutron-vpnaas; then
         :  # Started by plugin
@@ -532,8 +532,8 @@
         run_process q-l3 "$AGENT_L3_BINARY $(determine_config_files neutron-l3-agent)"
     fi
 
-    run_process q-meta "$AGENT_META_BINARY --config-file $NEUTRON_CONF --config-file=$Q_META_CONF_FILE"
-    run_process q-lbaas "$AGENT_LBAAS_BINARY --config-file $NEUTRON_CONF --config-file=$LBAAS_AGENT_CONF_FILENAME"
+    run_process q-meta "$AGENT_META_BINARY --config-file $NEUTRON_CONF --config-file $Q_META_CONF_FILE"
+    run_process q-lbaas "$AGENT_LBAAS_BINARY --config-file $NEUTRON_CONF --config-file $LBAAS_AGENT_CONF_FILENAME"
     run_process q-metering "$AGENT_METERING_BINARY --config-file $NEUTRON_CONF --config-file $METERING_AGENT_CONF_FILENAME"
 
     if [ "$VIRT_DRIVER" = 'xenserver' ]; then