e2e: simplify gcePD .yaml files

Setting command line arguments via env variables that are not needed
by the binaries is just unnecessarily complex. The driver renaming
code in the E2E manifest PR would have to be made more complex to deal
with such a deployment. It is easier for that code and humans who look
at the .yaml file to remove the indirection.

test/e2e/testing-manifests/storage-csi/gce-pd/controller_ss.yaml

@@ -20,10 +20,7 @@ spec:
           args:
             - "--v=5"
             - "--provisioner=com.google.csi.gcepd"
-            - "--csi-address=$(ADDRESS)"
-          env:
-            - name: ADDRESS
-              value: /csi/csi.sock
+            - "--csi-address=/csi/csi.sock"
           volumeMounts:
             - name: socket-dir
               mountPath: /csi
@@ -32,10 +29,7 @@ spec:
           image: quay.io/k8scsi/csi-attacher:v0.2.0
           args:
             - "--v=5"
-            - "--csi-address=$(ADDRESS)"
-          env:
-            - name: ADDRESS
-              value: /csi/csi.sock
+            - "--csi-address=/csi/csi.sock"
           volumeMounts:
             - name: socket-dir
               mountPath: /csi
@@ -44,11 +38,9 @@ spec:
           image: gcr.io/google-containers/volume-csi/gcp-compute-persistent-disk-csi-driver:v0.1.0.alpha
           args:
             - "--v=5"
-            - "--endpoint=$(CSI_ENDPOINT)"
+            - "--endpoint=unix:///csi/csi.sock"
             - "--nodeid=$(KUBE_NODE_NAME)"
           env:
-            - name: CSI_ENDPOINT
-              value: unix:///csi/csi.sock
             - name: KUBE_NODE_NAME
               valueFrom:
                 fieldRef:

test/e2e/testing-manifests/storage-csi/gce-pd/node_ds.yaml

@@ -18,13 +18,9 @@ spec:
           image: quay.io/k8scsi/driver-registrar:v0.3.0
           args:
             - "--v=5"
-            - "--csi-address=$(ADDRESS)"
-            - "--kubelet-registration-path=$(DRIVER_REG_SOCK_PATH)"
+            - "--csi-address=/csi/csi.sock"
+            - "--kubelet-registration-path=/var/lib/kubelet/plugins/com.google.csi.gcepd/csi.sock"
           env:
-            - name: ADDRESS
-              value: /csi/csi.sock
-            - name: DRIVER_REG_SOCK_PATH
-              value: /var/lib/kubelet/plugins/com.google.csi.gcepd/csi.sock
             - name: KUBE_NODE_NAME
               valueFrom:
                 fieldRef:
@@ -41,11 +37,9 @@ spec:
           image: gcr.io/google-containers/volume-csi/gcp-compute-persistent-disk-csi-driver:v0.1.0.alpha
           args:
             - "--v=5"
-            - "--endpoint=$(CSI_ENDPOINT)"
+            - "--endpoint=unix:///csi/csi.sock"
             - "--nodeid=$(KUBE_NODE_NAME)"
           env:
-            - name: CSI_ENDPOINT
-              value: unix:///csi/csi.sock
             - name: KUBE_NODE_NAME
               valueFrom:
                 fieldRef: