Upgrade scripts contain the following changes:
- getting right name of triggers, following the pattern *_tr
- redefining funtion arguments for each function using define_function_args
- getting rid of unncesary backslashes, used for escaping, in some functions.
- redefinitions of content_type__refresh_trigger and content_type__drop_type in order to get rid of some 7.2 vs 7.3 querying.