Implement EF.ARR (Access Rule Reference) decoding

The Access Mode (AM) and Security Condition (SC) DOs are incredibly
convoluted, so we need a lot of code to properly decode them.

Change-Id: If4f0725a849d41fd93de327ed00996d8179f2b0e

contrib/jenkins.sh

@@ -22,6 +22,7 @@ pip install pyyaml
 pip install cmd2
 pip install jsonpath-ng
 pip install construct
+pip install bidict
 
 # Execute automatically discovered unit tests first
 python -m unittest discover -v -s tests/