docs: Update testing documentation (#2446)
docs: Update testing documentation (#2446)

* docs: Update testing documentation

* remove references to the JDBC testsuite from sun
pgjdbc/pgjdbc,pgjdbc/pgjdbc,pgjdbc/pgjdbc,jorsol/pgjdbc,jorsol/pgjdbc,jorsol/pgjdbc,pgjdbc/pgjdbc,jorsol/pgjdbc