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Keep all options (raw + formated) and check which one is better.

Change-Id: Iab0cb012a6620a36fb81f91c24c6fed4c30191bd
diff --git a/src/com/mirantis/mk/Openstack.groovy b/src/com/mirantis/mk/Openstack.groovy
index c965b81..75be7f4 100644
--- a/src/com/mirantis/mk/Openstack.groovy
+++ b/src/com/mirantis/mk/Openstack.groovy
@@ -124,6 +124,7 @@
     for ( int i = 0; i < environment.size; i++ ) {
         envString = "${envString}  ${environment.get(i).get(0)}: ${environment.get(i).get(1)}\n"
     }
+    echo("writing to env file:\n${envString}")
     writeFile file: file, text: envString
 }