aegir test: spawn mocha ENOENT

[mkg20001]

Same as #5

Test Node.js
spawn mocha ENOENT
Error: spawn mocha ENOENT
    at Process.ChildProcess._handle.onexit (internal/child_process.js:232:19)
    at onErrorNT (internal/child_process.js:407:16)
    at process._tickCallback (internal/process/next_tick.js:63:19)
    at Function.Module.runMain (pkg/prelude/bootstrap.js:1323:13)
    at /snapshot/aegir/cli.js.0 (pkg/prelude/bootstrap.js:1530:19)
    at pkg/prelude/bootstrap.js:1532:3
    at readPrelude (/home/maciej/aegir-bundle/build/aegir/out/aegir-linux.js:32:12)
    at /home/maciej/aegir-bundle/build/aegir/out/aegir-linux.js:38:20
    at /home/maciej/aegir-bundle/build/aegir/out/aegir-linux.js:45:4
    at Object.<anonymous> (/home/maciej/aegir-bundle/build/aegir/out/aegir-linux.js:46:2)