Translated some error codes to OperationalError as requested by Matthew Harriger; translated if/elseif/else logic to switch statement to make it more readable and to allow for additional translation if desired.
Translated some error codes to OperationalError as requested by Matthew
Harriger; translated if/elseif/else logic to switch statement to make it more
readable and to allow for additional translation if desired.


git-svn-id: b746c3c07d6b14fe725b72f068c7252a81557b48@91 0cf6dada-cf32-0410-b4fe-d86b42e8394d

Bluehorn/cx_Oracle,Bluehorn/cx_Oracle,Bluehorn/cx_Oracle