Fix MySQL configuration step in the installation docs

[berkerpeksag]

No description provided.

[willkg]

Does this make all the mysql command lines look the same? If not, can you go through and make them all look the same in regards to the -u and -p flags?

[berkerpeksag]

I've updated my patch.

[willkg]

Awesome! I'll look through this tomorrow.

[willkg]

Landed in master in 768f0b4

Two things:

1. In the future, it helps if commit messages conform to good git commit message conventions. In the Kitsune guide, is http://kitsune.readthedocs.org/en/latest/coding.html#git-conventions which refers back to the wrong page in the mozweb bootcamp guide but should refer to http://mozweb.readthedocs.org/en/latest/git.html#commit-messages which talks about how commit messages should look. I fixed your commit message, so it's better.
2. Thank you! Fixing the docs and making them better helps everyone.