[CSI cinder]update chart cacert location to /etc/caert (kubernetes#1170)

per doc for chart and our previous manifest, cacert is located
at /etc/cacert

Author: jichenjc

charts/cinder-csi-plugin/templates/controllerplugin-statefulset.yaml

@@ -101,12 +101,12 @@ spec:
             - name: socket-dir
               mountPath: /csi
             - name: cacert
-              mountPath: /etc/kubernetes
+              mountPath: /etc/cacert
               readOnly: true
       volumes:
         - name: cacert
           hostPath:
-            path: /etc/kubernetes
+            path: /etc/cacert
             type: Directory
         - name: socket-dir
-          emptyDir:
+          emptyDir:

charts/cinder-csi-plugin/templates/nodeplugin-daemonset.yaml

@@ -74,12 +74,12 @@ spec:
               mountPath: /dev
               mountPropagation: "HostToContainer"
             - name: cacert
-              mountPath: /etc/kubernetes
+              mountPath: /etc/cacert
               readOnly: true
       volumes:
         - name: cacert
           hostPath:
-            path: /etc/kubernetes
+            path: /etc/cacert
             type: Directory
         - name: socket-dir
           hostPath:
@@ -100,4 +100,4 @@ spec:
         - name: pods-probe-dir
           hostPath:
             path: /dev
-            type: Directory
+            type: Directory