fix_noCatalog

[redfish-zly]

Check List:

• Unit tests: YES / NO / NA
• Documentation: YES / NO / NA

[filiphr]

What are you trying to fix here @redfish-zly? I am not sure that we should be using the connection on this level. The connectionMetadataDefaultCatalog is eventually used only in AbstractSqlScriptBasedDbSchemaManager, so if something needs changing we can maybe do it directly there.

Would also be good to have a bit more insight in what problem you are trying to solve

[redfish-zly]

@filiphr
Hello senior, I am not sure if my solution is correct. Here are the problems I have encountered.
Preconditions:
There are two database instances on the MySQL server, flowableTest1,
flowableTest2。
Among them, flowableTest1 has already initialized the process related tables (Act_ *), but flowableTest2 does not.
At this point, when my springboot project connects to flowableTest2 and says' flowable. database schema update=create ', the initialization of the flowableTest2 table fails due to the null catalog.