Fix build (jshint + unit test)

[Clement134]

Fix jshint errors et failing unit test.

./node_modules/.bin/jshint --exclude-path .gitignore .
lib/pkgcloud/amazon/storage/client/containers.js: line 131, col 12, 'deleteFiles' was used before it was defined.
lib/pkgcloud/amazon/storage/client/containers.js: line 135, col 12, 'destroyFile' was used before it was defined.

lib/pkgcloud/google/storage/client/containers.js: line 112, col 12, 'deleteFiles' was used before it was defined.
lib/pkgcloud/google/storage/client/containers.js: line 116, col 12, 'destroyFile' was used before it was defined.

lib/pkgcloud/openstack/context/identity.js: line 195, col 12, 'getTenantId' was used before it was defined.

lib/pkgcloud/openstack/context/service.js: line 114, col 12, 'getUrl' was used before it was defined.
lib/pkgcloud/openstack/context/service.js: line 131, col 12, 'endpointMatchDesiredInterface' was used before it was defined.

lib/pkgcloud/openstack/database/client/users.js: line 146, col 12, 'makeRequest' was used before it was defined.

test/common/base/client-test.js: line 41, col 16, 'handleResponse' was used before it was defined.
test/common/base/client-test.js: line 84, col 16, 'handleResponse' was used before it was defined.

test/common/databases/flavor-test.js: line 126, col 12, 'setupGetFlavorsMock' was used before it was defined.

11 errors

1) pkgcloud/openstack/storage/ The openstack Storage client copy should copy within the same container:
     Uncaught Error: No Match For: POST /v2.0/tokens
      at IncomingMessage.<anonymous> (/home/travis/build/pkgcloud/pkgcloud/node_modules/hock/lib/hock.js:364:15)
      at emitNone (events.js:86:13)
      at IncomingMessage.emit (events.js:185:7)
      at endReadableNT (_stream_readable.js:978:12)
      at _combinedTickCallback (internal/process/next_tick.js:80:11)
      at process._tickCallback (internal/process/next_tick.js:104:9)
  2) pkgcloud/openstack/storage/ The openstack Storage client copy "after each" hook:
     Error: timeout of 4000ms exceeded
      at Timeout.<anonymous> (/home/travis/build/pkgcloud/pkgcloud/node_modules/mocha/lib/runnable.js:158:19)
      at ontimeout (timers.js:386:11)
      at tryOnTimeout (timers.js:250:5)
      at Timer.listOnTimeout (timers.js:214:5)

[Clement134]

@mattgrande, @rosskukulinski could you merge this PR to fix travis build and release a new version in npm ?

[mattgrande]

Thanks for this!