[go-migration] postgresql_jdbc framework seems not detected when having a PostgreSQL service binding at place

[kiril-keranov]

When staging an application having a PostgreSQL service binding like:

buildpack: "https://github.com/cloudfoundry/java-buildpack.git#feature/go-migration"
  services:
  - test_postgresql

or another example:

buildpack: "https://github.com/cloudfoundry/java-buildpack.git#feature/go-migration"
  services:
  - INTEGRATION_TESTS_POSTGRESQL

the postgresql_jdbc is not detected and postgresql driver is not downloaded.
The same examples above work properly when staging with the current ruby buildpack:

Staging app and tracing logs...
   Cell 8ae72bad-b37d-47bf-8a20-ecf3d268a055 creating container for instance 531618aa-0c12-4808-bd09-0ed7ee7f202b
   Security group rules were updated
   Cell 8ae72bad-b37d-47bf-8a20-ecf3d268a055 successfully created container for instance 531618aa-0c12-4808-bd09-0ed7ee7f202b
   Downloading app package...
   Downloaded app package (6.3K)
   -----> Java Buildpack cb524cc | https://github.com/cloudfoundry/java-buildpack.git#cb524cc
   -----> Downloading Jvmkill Agent 1.17.0_RELEASE from https://java-buildpack.cloudfoundry.org/jvmkill/jammy/x86_64/jvmkill-1.17.0-RELEASE.so (0.1s)
   -----> Downloading Open Jdk JRE 1.8.0_452 from https://java-buildpack.cloudfoundry.org/openjdk/jammy/x86_64/bellsoft-jre8u452%2B11-linux-amd64.tar.gz (0.7s)
   Expanding Open Jdk JRE to .java-buildpack/open_jdk_jre (0.6s)
   JVM DNS caching disabled in lieu of BOSH DNS caching
   -----> Downloading Open JDK Like Memory Calculator 3.13.0_RELEASE from https://java-buildpack.cloudfoundry.org/memory-calculator/jammy/x86_64/memory-calculator-3.13.0-RELEASE.tar.gz (0.0s)
   Loaded Classes: 8433, Threads: 250
   -----> Downloading Client Certificate Mapper 2.0.1 from https://java-buildpack.cloudfoundry.org/client-certificate-mapper/client-certificate-mapper-2.0.1.jar (0.0s)
   -----> Downloading Container Security Provider 1.20.0_RELEASE from https://java-buildpack.cloudfoundry.org/container-security-provider/container-security-provider-1.20.0-RELEASE.jar (0.0s)
   -----> Downloading Postgresql JDBC 42.7.9 from https://java-buildpack.cloudfoundry.org/postgresql-jdbc/postgresql-jdbc-42.7.9.jar (0.0s)

[kiril-keranov]

There might be issues with the other frameworks also not only with postgresql as the issue comes from a more general code