fixed quotes in pepper wit offline deployment

Change-Id: I567596c189fbbe046288a38d9c807be090597462
diff --git a/src/com/mirantis/mk/Salt.groovy b/src/com/mirantis/mk/Salt.groovy
index 7451f34..34c5d56 100644
--- a/src/com/mirantis/mk/Salt.groovy
+++ b/src/com/mirantis/mk/Salt.groovy
@@ -678,7 +678,7 @@
         writeFile file: pepperCmdFile, text: dataStr
         pepperCmd = "pepper -c ${venv}/pepperrc --make-token -x ${venv}/.peppercache --json-file ${pepperCmdFile}"
     } else {
-        pepperCmd = "pepper -c ${venv}/pepperrc --make-token -x ${venv}/.peppercache --json \"" + dataStr + "\""
+        pepperCmd = "pepper -c ${venv}/pepperrc --make-token -x ${venv}/.peppercache --json \\\"" + dataStr + "\\\""
     }
 
     if (venv) {