Description of problem:
When you run rhn-charsets or spacewalk-debug on SWnightly with PostgreSQL DB backend, there is a Traceback. Also spacewalk-debug prints other error about missing /etc/tnsnames.ora.


Version-Release number of selected component (if applicable):
spacewalk-backend-tools-1.8.14-1.el6.noarch
spacewalk-postgresql-1.7.3-1.el6.noarch


How reproducible:
1 of 1


Steps to Reproduce:
1. # spacewalk-debug


Actual results:
# spacewalk-debug 
Collecting and packaging relevant diagnostic information.
Warning: this may take some time...
    * copying configuration information
cp: cannot stat `/etc/tnsnames.ora': No such file or directory
    * copying logs
    * copying cobbler files
    * copying monitoring moc logs
    * copying monitoring scout logs
    * copying ssl-build
    * copying /etc/sudoers
    * copying apache, oracle, tomcat, nocpulse entries from /etc/passwd
    * copying apache, oracle, tomcat, nocpulse entries from /etc/group
    * querying RPM database (versioning of Spacewalk, etc.)
    * querying schema version, database charactersets and database
SQL error occurred, traceback follows...
Traceback (most recent call last):
  File "/usr/bin/rhn-charsets", line 85, in <module>
    h.execute()
  File "/usr/lib/python2.6/site-packages/spacewalk/server/rhnSQL/sql_base.py", line 163, in execute
    return apply(self._execute_wrapper, (self._execute, ) + p, kw)
  File "/usr/lib/python2.6/site-packages/spacewalk/server/rhnSQL/driver_postgresql.py", line 282, in _execute_wrapper
    retval = apply(function, p, kw)
  File "/usr/lib/python2.6/site-packages/spacewalk/server/rhnSQL/sql_base.py", line 217, in _execute
    return self._execute_(args, kwargs)
  File "/usr/lib/python2.6/site-packages/spacewalk/server/rhnSQL/driver_postgresql.py", line 295, in _execute_
    self._real_cursor.execute(self.sql, params)
spacewalk.server.rhnSQL.sql_base.SQLStatementPrepareError: ('relation "nls_database_parameters" does not exist\nLINE 3:                 FROM   nls_database_parameters\n                               ^\n', 0, "\n                SELECT parameter, value\n                FROM   nls_database_parameters\n                WHERE  parameter = 'NLS_CHARACTERSET'\n                    OR parameter = 'NLS_NCHAR_CHARACTERSET'\n                ")
    * get diskspace available
    * get database statistics
    * get schema statistics
    * copying schema upgrade logs
    * copying audit.log
    * timestamping
    * creating tarball (may take some time): /tmp/spacewalk-debug.tar.bz2
    * removing temporary debug tree

Debug dump created, stored in /tmp/spacewalk-debug.tar.bz2


Expected results:
No traceback, no error message shown in the output.