Bug 8353: Adds a test to check for missing sysprefs in the database

Bug 8353: Adds a test to check for missing sysprefs in the database

Adds a non-test mode (--showsql option) that displays the missing
sysprefs as sql inserts.  Some sysprefs were missed from the syspref
file due to extra spaces in the insert : fixed. The test now checks if
there are at least as many sysprefs in the database as in the syspref
file (instead of checking for the exact number)

Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>
Cherrypicked from BibLibre master, rebased onto current master, and
corrected typos, 2012-07-03

Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>