Update the mysql documentation concerning charsets
Update the mysql documentation concerning charsets

This commit changes the mysql setup documentation because
there is no need to use latin1 encoding if you are using
another engine than the MyISAM engine.

Bug: Issue 1273
Change-Id: I432957381385c3e0390bb0db245139954300ecb8
(cherry picked from commit 13d07ecc7cd98cfd928a2b06d8755aea1fddde61)

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