Suppress setting spring.datasource.url by cf_env (#320)

The library [Java CF Env](https://github.com/pivotal-cf/java-cfenv/tree/main/java-cfenv-boot) is added to the classpath by the java_buildpack on startup. This change prevents it from configuring our datasource.

Author: mofterdinger

.gitignore

@@ -25,6 +25,7 @@ package-lock.json
 .mta/
 *.mtar
 mta.yaml
+mta_archives/
 
 *.log*
 gc_history*

mta.yaml

@@ -18,6 +18,11 @@ modules:
         SPRING_PROFILES_ACTIVE: cloud
         JBP_CONFIG_COMPONENTS: '{jres: ["JavaBuildpack::Jre::SapMachineJRE"]}'
         JBP_CONFIG_SAP_MACHINE_JRE: '{ jre: { version: "17.+" } }'
+        # We do not want cfenv to configure the DataSource for us
+        # cfenv uses names of the services, so this variable must be adapted if needed
+        # as CFENV_SERVICE_[service-name]_ENABLED
+        # See https://docs.cloudfoundry.org/buildpacks/java/configuring-service-connections.html
+        CFENV_SERVICE_BOOKSHOP-PG-DB_ENABLED: false
     build-parameters:
       builder: custom
       commands: