FetcherTest.ExtractZipFile assumes `unzip` is installed

[ RUN      ] FetcherTest.ExtractZipFile
W0322 06:46:42.086458  3635 fetcher.cpp:805] Begin fetcher log (stderr in sandbox) for container b71f9a05-9561-402a-b33a-c9dc4f8b03cc from running command: /home/vagrant/build-mesos-2/src/mesos-fetcher
I0322 06:46:41.895934  3653 fetcher.cpp:424] Fetcher Info: {"cache_directory":"\/tmp\/mesos\/fetch\/slaves\/","items":[{"action":"BYPASS_CACHE","uri":{"extract":true,"value":"\/tmp\/0OaVy1\/from\/yMUPVR.zip"}}],"sandbox_directory":"\/tmp\/0OaVy1"}
I0322 06:46:41.896709  3653 fetcher.cpp:379] Fetching URI '/tmp/0OaVy1/from/yMUPVR.zip'
I0322 06:46:41.896719  3653 fetcher.cpp:250] Fetching directly into the sandbox directory
I0322 06:46:41.896729  3653 fetcher.cpp:187] Fetching URI '/tmp/0OaVy1/from/yMUPVR.zip'
I0322 06:46:41.896738  3653 fetcher.cpp:167] Copying resource with command:cp '/tmp/0OaVy1/from/yMUPVR.zip' '/tmp/0OaVy1/yMUPVR.zip'
I0322 06:46:41.899859  3653 fetcher.cpp:84] Extracting with command: unzip -o -d '/tmp/0OaVy1' '/tmp/0OaVy1/yMUPVR.zip'
sh: unzip: command not found
Failed to fetch '/tmp/0OaVy1/from/yMUPVR.zip': Failed to extract: command unzip -o -d '/tmp/0OaVy1' '/tmp/0OaVy1/yMUPVR.zip' exited with status: 32512

End fetcher log for container b71f9a05-9561-402a-b33a-c9dc4f8b03cc
E0322 06:46:42.087045  3635 fetcher.cpp:520] Failed to run mesos-fetcher: Failed to fetch all URIs for container 'b71f9a05-9561-402a-b33a-c9dc4f8b03cc' with exit status: 256
/mesos-2/src/tests/fetcher_tests.cpp:688: Failure
(fetch).failure(): Failed to fetch all URIs for container 'b71f9a05-9561-402a-b33a-c9dc4f8b03cc' with exit status: 256
[  FAILED  ] FetcherTest.ExtractZipFile (227 ms)
[----------] 1 test from FetcherTest (227 ms total)

[  FAILED  ] FetcherTest.ExtractZipFile
[  FAILED  ] FetcherTest.ExtractInvalidZipFile
[  FAILED  ] FetcherTest.ExtractZipFileWithDuplicatedEntries