Fix targetDir variable naming

Change-Id: Ie73b29e03c17f13fb6a773c184f4907d165608c8
diff --git a/vars/gitSSHCheckout.txt b/vars/gitSSHCheckout.txt
index 087d018..47bf702 100644
--- a/vars/gitSSHCheckout.txt
+++ b/vars/gitSSHCheckout.txt
@@ -1,6 +1,6 @@
 // Default parameters
 
-  target_dir = "./"
+  targetDir = "./"
   port = "29418"
 
 // Usage example
@@ -21,7 +21,7 @@
     branch = "mcp-0.1"
     host = "ci.mcp-ci.local"
     project = "projectcalico/calico-containers"
-    target_dir = "some_directory"
+    targetDir = "some_directory"
   }
 }