Change the class hierarchy of the exceptions: remove IDSServerError. The IDS server exceptions are directly derived from IDSError, which in turn is derived from ServerError, formally known as ICATException. IDSResponseError is not any more derived from IDSError but rather from Exception.
Change the class hierarchy of the exceptions: remove IDSServerError.
The IDS server exceptions are directly derived from IDSError, which in
turn is derived from ServerError, formally known as ICATException.
IDSResponseError is not any more derived from IDSError but rather from
Exception.

git-svn-id: 5b1347ddac5aba1438c637217dfe0bb137609099@817 8efdbd46-c5fb-49ab-9956-99f62928ec21

icatproject/python-icat