This commit updates the MLE attach process so that in the first attach
cycle device tries a total of six MLE Parent Requests, the first two
to routers only followed by four to routers and REEDs. For example,
the six Parent Request message will be used before device can decide
to act the leader. An MTD in the next attach attempt (if cannot find a
parent in first attempt cycle), will go to the model of two Parent
Requests (first to routers, then to routers/REEDs).
This change impacts the time it takes for a device to start as leader
(due to increased number of Parent Request and wait time). This commit
updates different test scripts to address the change in the wait
time. It adds a new `config.LEADER_STARTUP_DELAY` constants which is
used for wait time for leader to start.
According to PEP8, constants should be written in all capital letters.
This commit capitalizes these constants:
- thread_cert.TestCase.topology
- thread_cert.TestCase.support_ncp
- Update all test cases to inherit thread_cert.TestCase and update
topologies accordingly. The topologies should all be correct because
they are automatically generated, not hand written.
- Use default Thread version: 1.1
- Cleanup node tmp files in tmp directory according to the current
PORT_OFFSET in setUp. This is required by
test_reed_address_solicit_rejected.py and test_coap_observe.py since
they define multiple test functions in one TestCase.
- Removed call to set_extaddr64 because it's not necessary and causing
failures.
Abtin Keshavarzian