Simplify ST_Transform tests
Fix typo
Use new signature introduced in #330
Set ST_Transform=identity if inputCRS=outputCRS
Format better
Take care of #307
Add test for 4326 -> 2154 -> 4326
Fix unit test depending on Java version
Add author [ci skip]
Merge pull request #332 from agouge/307

Make ST_Transform return a MULTILINESTRING for MULTILINESTRING input
This is about #307. I force `ST_Transform` of a `MULTILINESTRING` to be a `MULTILINESTRING`, even
though JTS doesn't do this. This is particularly useful for exporting to SHP.

**NOTE**: I change `ST_Transform` to return the input geometry directly if the input and output CRSes are the same.

I also clean up `ST_Transform`'s unit tests:

* make them more readable
* fix typos
* always check output SRID
* add 2 unit tests