mk/Docker: Dont use cache for image build

Change-Id: Iace16460552dd62af7070315953184eb12135a14
diff --git a/src/com/mirantis/mk/Docker.groovy b/src/com/mirantis/mk/Docker.groovy
index 1357dc1..7b57e5b 100644
--- a/src/com/mirantis/mk/Docker.groovy
+++ b/src/com/mirantis/mk/Docker.groovy
@@ -22,6 +22,7 @@
         sh "git checkout -f ${dockerFile}; sed -i -e 's,^FROM.*,FROM ${baseImg},g' ${dockerFile}"
     }
 
+    params << "--no-cache"
     params << "-f ${dockerFile}"
     params << imageDir
 
@@ -51,4 +52,4 @@
     }
 
     return img
-}
\ No newline at end of file
+}