[BUGFIX] EM 6.0 doesn't store extension state from TER

The extension state is stored as text in the TER dump, but stored as
an integer in the database. The correct conversion must be done to
be able to show the states from extensions in TER.

Change-Id: I9fc05a61df1df71696c690874507f7bbc51e9aab
Fixes: #42260
Releases: 6.0
Reviewed-on: http://review.typo3.org/15877
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel
Reviewed-by: Jigal van Hemert
Tested-by: Jigal van Hemert