Improve error handling when no utPLSQL is installed

[PhilippSalvisberg]

In version < 1.0.0 the worksheet reporter was started, even if no utPLSQL was installed in the database. In that case the user got the following error in the script output:

ORA-06550: line 1, column 57:
PLS-00201: identifier 'UT.RUN' must be declared
ORA-06550: line 1, column 57:
PL/SQL: Statement ignored
06550. 00000 -  "line %s, column %s:\n%s"
*Cause:    Usually a PL/SQL compilation error.
*Action:

This was good.

Starting with version 1.0.0 the realtime reporter is the default. When utPLSQL is not installed, nothing happens. Based on the statement log, it's clear that the ut.version statement fails.

I see two options for a user feedback.

a) an alert message informing the user, that utPLSQL is not installed
b) run the worksheet reporter as in previous versions and let the user figure out what the message means.

[PhilippSalvisberg]

I decided to go for option b). It's simpler to implement and it gives the user a feedback.