Update the test to fix bug-19

The pitch needed to be centered, hense why the motors seem to behave
awkwardly.

Also removed the sleep because set and get Flight controls no longer
requires the actual movement of the servo's, this should be moved to the
dashee::test::Vehicle::testUpdate() function

fixes #19
Merge branch 'bug-19' into testing
Merge branch 'testing' into sensor
Added default constructor tests
Accelerometer I2C construction

You can now create an Accelerometer object by passing in an I2C pointer
helpful when you want to set your own I2C interface