Set --use-service-account-credentials=false (kubernetes#2572)

The above option seems to be causing CCM to create clients using
ServiceAccount from the `kube-system` namespace, so requires users to
either run in `kube-system` namespace, or manage 2 ServiceAccounts, one
in `kube-system` and other in regular CCM namespace. See [1].

This commit changes this setting.

[1] https://github.com/kubernetes/cloud-provider/blob/c3862938334ba18226098015193374fda40ab7a9/options/options.go#L230-L237

Author: dulek

charts/openstack-cloud-controller-manager/templates/daemonset.yaml

@@ -54,7 +54,7 @@ spec:
             - --cloud-config=$(CLOUD_CONFIG)
             - --cluster-name=$(CLUSTER_NAME)
             - --cloud-provider=openstack
-            - --use-service-account-credentials=true
+            - --use-service-account-credentials=false
             - --controllers={{- trimAll "," (include "occm.enabledControllers" . ) -}}
             {{- if .Values.serviceMonitor.enabled }}
             - --bind-address=0.0.0.0

manifests/controller-manager/openstack-cloud-controller-manager-ds.yaml

@@ -45,7 +45,7 @@ spec:
             - --cluster-name=$(CLUSTER_NAME)
             - --cloud-config=$(CLOUD_CONFIG)
             - --cloud-provider=openstack
-            - --use-service-account-credentials=true
+            - --use-service-account-credentials=false
             - --bind-address=127.0.0.1
           volumeMounts:
             - mountPath: /etc/kubernetes/pki