change cmd.run to cmd.shell in sphinx / run not found in tests

Change-Id: Iec71e6ad0d36ec97196f9d16d1e439caf00b6466
diff --git a/glusterfs/meta/sphinx.yml b/glusterfs/meta/sphinx.yml
index 55c0408..c2b5b58 100644
--- a/glusterfs/meta/sphinx.yml
+++ b/glusterfs/meta/sphinx.yml
@@ -7,7 +7,7 @@
       name: server
       param:
         version:
-          value: "{{ salt['cmd.run']('gluster --version 2>/dev/null || echo "unknown"|head -1') }}"
+          value: "{{ salt['cmd.shell']('gluster --version 2>/dev/null || echo "unknown" |head -1') }}"
         {%- if pillar.glusterfs.server.get('peers', []) %}
         peers:
           value: {{ pillar.glusterfs.server.peers|yaml }}