Move merged Policy Templates from policies dir to techniques and rename to Techniques. Refs #2410 #2415
Merge branch 'branches/rudder/2.3'
Refs #2298 : finish the renaming in the technique
Fixes #2343 : correct the version of cfengine in the requierement
Rename containing folder for techniques to be 'techniques' rather than 'policies'. Refs #2295
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