Incompatable with mocha 3.x

[charlesverge]

When executing cordova-test android tests/mocha/ global install of mocha was needed as the 2.5.3 appear to of been ignored.
npm install -g [email protected]

With a newer version of mocha the following error appeared

1. Test example tests Checking button action should click a button:
   Error: Resolution method is overspecified. Specify a callback or return a Promise; not both.
   at /usr/local/lib/node_modules/wd/node_modules/q/q.js:2027:17
   at runSingle (/usr/local/lib/node_modules/wd/node_modules/q/q.js:137:13)
   at flush (/usr/local/lib/node_modules/wd/node_modules/q/q.js:125:13)
   at _combinedTickCallback (internal/process/next_tick.js:131:7)
   at process._tickCallback (internal/process/next_tick.js:180:9)