Support complex values for keys in setSaltOverride

for example hash: md5=source_hash

Change-Id: Ie6214fd0cbac4a5be100945e4a3e670f51c7d802
Related-PROD: PROD-26392
(cherry picked from commit 2f99730f1024e61269c99f73afb06d153792aa4b)
diff --git a/src/com/mirantis/mk/Salt.groovy b/src/com/mirantis/mk/Salt.groovy
index 2c6a182..d126964 100644
--- a/src/com/mirantis/mk/Salt.groovy
+++ b/src/com/mirantis/mk/Salt.groovy
@@ -1078,7 +1078,7 @@
          def value = entry[1]
 
          common.debugMsg("Set salt override ${key}=${value}")
-         runSaltProcessStep(saltId, "I@salt:master ${extra_tgt}", 'reclass.cluster_meta_set', [key, value], false)
+         runSaltProcessStep(saltId, "I@salt:master ${extra_tgt}", 'reclass.cluster_meta_set', ["name=${key}", "value=${value}"], false)
     }
     runSaltProcessStep(saltId, "I@salt:master ${extra_tgt}", 'cmd.run', ["git -C ${reclass_dir} update-index --skip-worktree classes/cluster/overrides.yml"])
 }