Review Request: Added an Allocator::activated to clean up conflating issues in Allocator::frameworkAdded and made sure we recover executor resources when a framework is removed.

[Benjamin Hindman]

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https://reviews.apache.org/r/6097/
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Review request for mesos, Thomas Marshall and Vinod Kone.


Description
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See summary.


This addresses bug MESOS-239.
    https://issues.apache.org/jira/browse/MESOS-239


Diffs
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  src/master/allocator.hpp e55b9ec 
  src/master/dominant_share_allocator.hpp bc5505b 
  src/master/dominant_share_allocator.cpp a2de26f 
  src/master/master.cpp 43407fa 
  src/tests/utils.hpp ced8592 

Diff: https://reviews.apache.org/r/6097/diff/


Testing
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make check


Thanks,

Benjamin Hindman