OIM/OAM 12c RCU Creation failed for Oracle Database 12c

Issue:

When we run RCU utility to create OIM/OAM Schemas, the following error is encountered
Mon Jul 24 13:36:02.696 UTC 2018 ERROR assistants.rcu.backend.task.PrereqTask: oracle.sysman.assistants.rcu.backend.task.PrereqTask::execute: Prereq Evaluation Failed
oracle.sysman.assistants.rcu.backend.validation.PrereqException:
ERROR – RCU-6083 Prerequisite check failed for selected component:
CAUSE – RCU-6083 Prerequisite check failed for selected component.
ACTION – RCU-6083 Refer to the RCU logs for additional details. Make sure that the prerequisite requirements are met.
Refer to RCU log at /tmp/RCU2018-07-24_13-30_1931354565/logs/rcu.log for details.
at oracle.sysman.assistants.rcu.backend.validation.PrereqEvaluator.executePrereqTask(PrereqEvaluator.java:713)
at oracle.sysman.assistants.rcu.backend.task.PrereqTask.execute(PrereqTask.java:68)
at oracle.sysman.assistants.rcu.backend.task.ActualTask.run(TaskRunner.java:346)
at java.lang.Thread.run(Thread.java:748)
Mon Jul 24 13:36:02.697 UTC 2018 ERROR assistants.rcu.backend.task.ActualTask: oracle.sysman.assistants.rcu.backend.task.ActualTask::run: RCU Operation Failed
oracle.sysman.assistants.common.task.TaskExecutionException:
ERROR – RCU-6083 Prerequisite check failed for selected component:
CAUSE – RCU-6083 Prerequisite check failed for selected component.
ACTION – RCU-6083 Refer to the RCU logs for additional details. Make sure that the prerequisite requirements are met.
Refer to RCU log at /tmp/RCU2018-09-24_13-30_1931354565/logs/rcu.log for details.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Error: Views/Synonyms required for XA transaction support are missing in this Database 12c.
These views/synonyms are required by the OIM Schema.
Action: Refer Oracle Database Administrator’s Guide to install XA transaction recovery views/synonyms using the script xaview.sql. Contact your DBA.
For Database12c CDB config: execute xaview.sql from PDB SYS user
For Database12c NON-CDB config: execute xaview.sql from CDB SYS user

Resolution:

Step 1
Login to your database as sys or any other user with sysdba privileges and run below two scripts

@$ORACLE_HOME/javavm/install/initxa.sql
@$ORACLE_HOME/rdbms/admin/xaview.sql

Step 2
Along with the above views, make sure following parameters are tuned as per Oracle's recommendation
PROCESSES (min > 300)
NLS_LENGTH_SEMANTICS (BYTE)
SHARED_POOL_SIZE ( min > 200MB)
SGA_MAX_SIZE (min > 200MB)
DB_BLOCK_SIZE (min > 8k)
OPEN_CURSORS (min > 1000)