Installer do not notify on failed popullation process

[rcdeoliveira]

I was testing WallacePOS installer using Percona XtraDB Cluster as database server, this last one has as default directive "pxc_strict_mode=ENFORCING"[1] that avoids few operation. The install wizard didn't report issues and assumed every was fine, but when I reviewed database I realized that there was just one empty table (auth). The install wizard should catch errors on database population and inform about it.

[supertin]

Had the same problem. Got weird errors about the database when I tried to continue configuring things. The lack of error message really makes it awkward to figure out what happened. Especially if it happens late in the SQL file (so it appears to have worked fine at first glance).