Review Request 58038: Removed redundant call to `std::string::c_str()` in Mesos.

[Neil Conway]

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https://reviews.apache.org/r/58038/
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Review request for mesos and Benjamin Bannier.


Repository: mesos


Description
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Spotted via clang-tidy.


Diffs
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  src/tests/containerizer/docker_volume_isolator_tests.cpp 
13a1f131973d15225e100b04f8e24c1f9f4d8539 


Diff: https://reviews.apache.org/r/58038/diff/1/


Testing
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`make check`


Thanks,

Neil Conway