Merge pull request #5 from Traackr/EMP-1641-composer-updates

EMP-1641 Allow any version of composer/installers

Merge pull request #4 from Traackr/obtain-db-lock

Obtain a db lock before running setup/update

Force verbose option for mysql command

Force verbose option (-vv) for mysql command to ensure it generates
output with number of rows affected by script. This output is capture by
the exec() PHP call and later displayed.

Output the SQL command output

Display the SQL script output captured during the exec() call.

Fix issue #3

Need to order versions by version number not created date when trying to
find when uograde to run. Versions could have been created in random
order if some older version where skipped and then run later (=> older
version but more recent created date).
Also fix status to SUCCESS

Merge pull request #2 from Traackr/issue_1_fix

fixes #1 skips errors, keeps track of error count, and reports error to ...

Code clean up and formatting + added some comments and output