Set mem a bit lower than 30 for falco

Author: ccoulombe

ansible/files/galaxy/config/tpv_rules_local.yml

@@ -73,7 +73,7 @@ tools:
     mem: min(max(int(input_size * 7), 5.6), 120)
   toolshed.g2.bx.psu.edu/repos/iuc/falco/falco/.*:
     cores: 6
-    mem: 30
+    mem: 28
 
 roles:
   training.*: