Fix enter/leave logging confusion

In a few places, misleading messages may confuse log readers, e.g.,
by indicating that a function is being entered when it is actually
being left.

Signed-off-by: Roger Luethi <roger.luethi@bisdn.de>
Change-Id: Ib8cc302574e6c49f2a0a60528b85d2310b31b8b5
diff --git a/vars/pgrep_port_forward.groovy b/vars/pgrep_port_forward.groovy
index 78ce5a7..de1bcb1 100644
--- a/vars/pgrep_port_forward.groovy
+++ b/vars/pgrep_port_forward.groovy
@@ -103,7 +103,7 @@
         throw err
     }
     finally {
-        enter('main')
+        leave('main')
     }
 
     return(ans)