Pin python-pymysql latest version MOS repo.

Change-Id: Ia42b38284331484df7bafe80773b7f5e1b28fd01
diff --git a/cinder/control/cluster.yml b/cinder/control/cluster.yml
index 868b71e..c130e97 100644
--- a/cinder/control/cluster.yml
+++ b/cinder/control/cluster.yml
@@ -4,6 +4,12 @@
 - service.keepalived.cluster.single
 - system.haproxy.proxy.listen.openstack.cinder
 parameters:
+  linux:
+    system:
+      package:
+        python-pymysql:
+          fromrepo: ${_param:openstack_version}
+          version: latest
   cinder:      
     volume:
       enabled: false
diff --git a/cinder/control/single.yml b/cinder/control/single.yml
index 58156cb..2d7f179 100644
--- a/cinder/control/single.yml
+++ b/cinder/control/single.yml
@@ -1,6 +1,12 @@
 classes:
 - service.cinder.control.single
 parameters:
+  linux:
+    system:
+      package:
+        python-pymysql:
+          fromrepo: ${_param:openstack_version}
+          version: latest
   cinder:
     volume:
       enabled: false
diff --git a/cinder/volume/single.yml b/cinder/volume/single.yml
index 9c8f7c2..de468ba 100644
--- a/cinder/volume/single.yml
+++ b/cinder/volume/single.yml
@@ -1,6 +1,12 @@
 classes:
 - service.cinder.volume.single
 parameters:
+  linux:
+    system:
+      package:
+        python-pymysql:
+          fromrepo: ${_param:openstack_version}
+          version: latest
   cinder:
     volume:
       enabled: True