Integration with EPM Planning was supported in OBIEE 220.127.116.11 and didn't require any configuration. You just had to make sure you used the html character code to replace the colon for the host:port and the Planning metadata imported successfully:
"For Hyperion Planning 18.104.22.168 or later, the installer does not deliver all of the required client driver .jar files. To ensure that you have all of the needed .jar files, go to your instance of Hyperion, locate and copy the adm.jar, ap.jar, and HspAdm.jar files and paste them into MIDDLEWARE_HOME\oracle_common\modules."
Copy the following files from your Planning install: