Remove debug statement which was confusing to users.

Additionally removed inactivated code referencing the debug quantity.
Clarify for user the phase in which a fatal error occurs.

Error messages indicate the following phases:
 * failure during setup phase prior to building;
 * failure during building;
 * failure during doxygen processing;
 * failure during integration testing.
Restructure process flow to allow error categorization.
Merge branch 'tickets/DM-1430'