0030920: can't use DB connection defined as JNDI service

Description

It is not possible to use DB connection defined as JNDI service because even having it configured, direct connection is tried to be created in some places.

The behavior is different depending on OB version:

* 3.0RC4-current pi (pre PR15Q4), this error is risen:
   [main] ERROR org.openbravo.database.ConnectionProviderImpl - Error getting connection java.sql.SQLException: No suitable driver found for null/null
    at java.sql.DriverManager.getConnection(DriverManager.java:689)
    at java.sql.DriverManager.getConnection(DriverManager.java:270)
    at org.openbravo.database.OpenbravoDriverManagerConnectionFactory.createConnection(OpenbravoDriverManagerConnectionFactory.java:55)
* current pi (pre PR15Q4), in same place a ClassCastException is thrown trying to cast JNDIConnectionProvider to ConnectionProviderImpl

Additionally, when it is combined with JdbcExternalConnectionPool:
* it tries to create two pools: one for DAL and another one for xsql connections
* DAL connections try to use direct DB connection rather than JNDI resulting in NPE if those properties are not set

Steps To Reproduce

* Configure Openbravo to use JNDI (removing the rest of direct DB connection settings) [1] removing from Openbravo.properties settings to use direct DB connection
* Start Tomcat

[1] follow documentation in http://wiki.openbravo.com/wiki/Projects:JNDI_Service/Technical_Documentation [^] until 0030918 is fixed

Issue History
Date Modified	Username	Field	Change
2015-09-24 12:39	alostale	Type	defect => backport
2015-09-24 12:39	alostale	Target Version	=> 3.0PR15Q3.3
2015-10-02 07:39	alostale	Note Added: 0080795
2015-10-02 07:39	alostale	Status	scheduled => closed

Notes
(0080795) alostale (manager) 2015-10-02 07:39	It won't be fixed as backport due the risk it would add and the low usage of this feature.