Review Request 67945: Made getters in the Slave class in the allocator return references.

[Meng Zhu]

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Review request for mesos and Benjamin Mahler.


Repository: mesos


Description
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This eliminates some unnecessary copies.


Diffs
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  src/master/allocator/mesos/hierarchical.hpp 
0f6c0e96a105c64465d3f5db4ff663d8fdfe7e26 


Diff: https://reviews.apache.org/r/67945/diff/1/


Testing
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make check


Thanks,

Meng Zhu