indentation fix up
little bug in gradle-find-project-dir, it wasn't returning a path with a
slash at the end.

This was TECHNICALLY finding the right directory, but when run from
compile (which displayed the right directory, sans ending "/"), for some
reason, gradle was trying to run from one more directory up.

Obviously, this isn't cool.  But it should be fixed now.

Tests reflect that it needs this slash as well.
better defined integration tests -- found `compilation-directory` and
`compile-command` variables that I am able to check instead of trying to
capture my own.

No longer need to mock, just had to set yes-or-no-p to always be true so
the tests wouldn't interrupt.  Makes the tests cleaner.

The gradle executable path is just a stub anyway, so the compilation
won't happen because that command is off.  This is just set this way so
I can check the compilation-command is what is expected.

The compilation-directory is in accordance with the unit tests as well,
checking for the slash at the end of the path.