Fixes #5547: Rewrite system techniques to use normal ordering on 2.6
Refs #5446: Rewrite techniques to use only ${}
Merge pull request #499 from peckpeck/bug_5547/rewrite_system_techniques_to_use_normal_ordering_on_2_6

Bug 5547/rewrite system techniques to use normal ordering on 2 6
Merge branch 'branches/rudder/2.6' into branches/rudder/2.10