coredb_mysql: lint

No changes to behavior; only presentational changes in this commit.
 - Spaces rather than tabs.
 - Align arrows.
 - Don't align equal sign, except in function signature
 - Single quotes when not interpolating.
 - Single resource per block.
 - Quote strings.
 - Quote octal permissions.
 - 'ensure' always first property.
 - Use ensure => link w/ target rather than implicit symlinks.
 - Every property ends with a comma
 - One class per include.
 - Resource name and resource type on same line.
 - [ space ] in arrays
 - '&>/dev/null' instead of '>/dev/null 2>&1'

Change-Id: I419f48c9713e5c59deac093ac86142d4d938a25c