DatabasePublisherTckTest flaky if MySQL

[xuwei-k]

• skip DatabasePublisherTckTest if mysql #2097

[yoskhdia]

Are the following errors a problem?

[info] DatabasePublisherTckTest:
[info] - optional_spec104_mustSignalOnErrorWhenFails *** FAILED ***
[info]   java.lang.RuntimeException: Publisher threw exception (Error-state Publisher scalikejdbc.streams.DatabasePublisher@5203e155 did not call `onError` on new Subscriber within 150 ms) instead of signalling error via onError!

The timeout is currently 150 milliseconds, and indeed this value may be flaky for some DBs.

scalikejdbc/scalikejdbc-streams/src/test/scala/somewhere/DatabasePublisherTckTest.scala

Line 158 in aecbb05

val timeoutMillis = 150L

Originally, TCK had a default value of 100 milliseconds, which was increased to 150 milliseconds due to unstable testing.
Therefore, increasing this timeout value slightly is one possible solution. What do you think?

[seratch]

If adjusting the duration works, I believe it's worth trying. Can you send a PR for it?