Arcyd: refactor, extract abdi_processrepolist fn

Tidy abdi_processrepolist.do() a bit by extracting a function which
appends the interrupting operations to the list of operations.

Test Plan:
$ ./precommit.sh
Arcyd: refactor, extract fn to turn repos to ops

Continue to simplify abdi_processrepolist.do() by extracting a function
to turn repos into DelayedRetryNotifyOperations.

Test Plan:
$ ./precommit.sh
Arcyd: refactor, extract configs to repos fn

Continue simplifying abdi_processrepolist.do() by extracting the loops
which converts repo_configs to repos.

Test Plan:
$ ./precommit.sh
Arcyd: refactor, extract fn to process list of ops

Continue to simplify abdi_processrepolist.do() by extracting a function
which processes the final list of operations.

Test Plan:
$ ./precommit.sh
Arcyd: refactor, abdi_processrepolist no need args

Remove the dependency of abdi_processrepolist on the layout of 'args' by
supplying separate arguments instead.

Test Plan:
$ ./precommit.sh
$ ./testbed/arcyd/acceptance_tests.sh