Fix 72 break suspension policy

[fabioz]

Note: built upon #671 to avoid conflicts (so, that one has to be merged first).

Changes can be seen at commit: 5641357 (note that it has some test changes along to fix some flakiness on pydevd tests on travis).

[codecov-io]

Codecov Report

Merging #673 into master will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #673      +/-   ##
==========================================
+ Coverage   60.18%   60.19%   +0.01%     
==========================================
  Files          27       27              
  Lines        3823     3824       +1     
==========================================
+ Hits         2301     2302       +1     
  Misses       1522     1522

Impacted Files	Coverage Δ
ptvsd/wrapper.py	52.78% <0%> (+0.03%)	⬆️

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[fabioz]

Rebased with current master.

Note that this patch only adds the break suspension policy to breakpoints. Working on providing the stack trace of live threads.

[fabioz]

This pull request is now ready to implement the feature to get the live stack traces.

Some other noteworthy changes:

• pydevd frames are now also filtered no longer appear for the user
• fixed racing condition regarding setting the pydevd thread id
• in case of a test timeout in pydevd tests the current thread dump is displayed
• remote debug threads allocate a new port to run
• added some missing variable types for cython

[DonJayamanne]

remote debug threads allocate a new port to run

What's this? Please could you explain this change/feature?

[fabioz]

remote debug threads allocate a new port to run

What's this? Please could you explain this change/feature?

Sorry, I didn't explain it well... it should be:

• Tests which check remote debugging use a new port to run the test.

(i.e.: it's an improvement only for pydevd tests).

[karthiknadig]