Failed to register driver for Oracle on JBoss

Issue

Oracle driver not found exception.
When configuring a oracle Data Source and test the connection from console, notice the below error:

    WARN  [org.jboss.resource.connectionmanager.JBossManagedConnectionPool] (ResourceContainer.invoker.nonDaemon-1) Throwable while attempting to get a new connection: null
    org.jboss.resource.JBossResourceException: Could not create connection; - nested throwable: (org.jboss.resource.JBossResourceException: Failed to register driver for: oracle.jdbc.driver.OracleDriver; - nested throwable: (java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver from BaseClassLoader@15b2e18{vfsfile:/jboss-eap-5.1/jboss-as/server/default/deploy/oracle-ds.xml}))
         at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.getLocalManagedConnection(LocalManagedConnectionFactory.java:225)
         at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.createManagedConnection(LocalManagedConnectionFactory.java:195)
         at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.createConnectionEventListener(InternalManagedConnectionPool.java:639)
         at org.jboss.resource.connectionmanager.InternalManagedConnectionPool.getConnection(InternalManagedConnectionPool.java:273)
         at org.jboss.resource.connectionmanager.JBossManagedConnectionPool$BasePool.getConnection(JBossManagedConnectionPool.java:690)
         at org.jboss.resource.connectionmanager.JBossManagedConnectionPool.internalTestConnection(JBossManagedConnectionPool.java:347)
         at org.jboss.resource.connectionmanager.JBossManagedConnectionPool.testConnection(JBossManagedConnectionPool.java:402)
         ... more
    Caused by: org.jboss.resource.JBossResourceException: Failed to register driver for: oracle.jdbc.driver.OracleDriver; - nested throwable: (java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver from BaseClassLoader@15b2e18{vfsfile:/jboss-eap-5.1/jboss-as/server/default/deploy/oracle-ds.xml})
         at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.getDriver(LocalManagedConnectionFactory.java:489)
         at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.getLocalManagedConnection(LocalManagedConnectionFactory.java:206)
         ... more
    Caused by: java.lang.ClassNotFoundException: oracle.jdbc.driver.OracleDriver from BaseClassLoader@15b2e18{vfsfile:/jboss-eap-5.1/jboss-as/server/default/deploy/oracle-ds.xml}
         at org.jboss.classloader.spi.base.BaseClassLoader.loadClass(BaseClassLoader.java:477)
         at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
         at java.lang.Class.forName0(Native Method)
         at java.lang.Class.forName(Class.java:247)
         at org.jboss.resource.adapter.jdbc.local.LocalManagedConnectionFactory.getDriver(LocalManagedConnectionFactory.java:474)