Stable Release v4.3-r1

• changing the default to not catch metadata #342 @geichelberger @ferishili @MatthiasKollenbroichWWU
• wait for the response of duplication workflow #345 @justusdieckmann
• Fix unwanted deletion of lti modules #348 (fixes #346) @ferishili
• updating to 4.3 @justusdieckmann
• minor style changes