Make project Elixir 0.14.3 compatible

Change-Id: I75f1938a8ce3e53417730e174a49752d7d9de82c
Address test order dependency

Change-Id: I010a0a4ba5cd779046b2fec19c8fbefb0283378c
Update details in mix.exs

Change-Id: Ibd9538e919368ffc4dce0db4176fe1dae70feca9