deployer install: lowercase some variables

Fix openshift/origin-aggregated-logging#224
which notes that several variables are referred to in the install script
in uppercase which only works if they were passed in as env vars, not
via the configmap. Now the lowercase, mapped versions are used.

deployer/scripts/install.sh

@@ -388,9 +388,9 @@ function generate_es() {
     pvcs["$pvc"]=1  # note, map all that exist, not just ones labeled as supporting
   done
   for ((n=1;n<=${es_cluster_size};n++)); do
-    pvc="${ES_PVC_PREFIX}$n"
-    if [ "${pvcs[$pvc]}" != 1 -a "${ES_PVC_SIZE}" != "" ]; then # doesn't exist, create it
-      oc new-app logging-pvc-${es_pvc_dynamic:+"dynamic-"}template -p "NAME=$pvc,SIZE=${ES_PVC_SIZE}"
+    pvc="${es_pvc_prefix}$n"
+    if [ "${pvcs[$pvc]}" != 1 -a "${es_pvc_size}" != "" ]; then # doesn't exist, create it
+      oc new-app logging-pvc-${es_pvc_dynamic:+"dynamic-"}template -p "NAME=$pvc,SIZE=${es_pvc_size}"
       pvcs["$pvc"]=1
     fi
     if [ "${pvcs[$pvc]}" = 1 ]; then # exists (now), attach it
@@ -405,9 +405,9 @@ function generate_es() {
 
   if [ "${input_vars[enable-ops-cluster]}" == true ]; then
     for ((n=1;n<=${es_ops_cluster_size};n++)); do
-      pvc="${ES_OPS_PVC_PREFIX}$n"
-      if [ "${pvcs[$pvc]}" != 1 -a "${ES_OPS_PVC_SIZE}" != "" ]; then # doesn't exist, create it
-        oc new-app logging-pvc-${es_ops_pvc_dynamic:+"dynamic-"}template -p "NAME=$pvc,SIZE=${ES_OPS_PVC_SIZE}"
+      pvc="${es_ops_pvc_prefix}$n"
+      if [ "${pvcs[$pvc]}" != 1 -a "${es_ops_pvc_size}" != "" ]; then # doesn't exist, create it
+        oc new-app logging-pvc-${es_ops_pvc_dynamic:+"dynamic-"}template -p "NAME=$pvc,SIZE=${es_ops_pvc_size}"
         pvcs["$pvc"]=1
       fi
       if [ "${pvcs[$pvc]}" = 1 ]; then # exists (now), attach it