Clean up database documentation

The following documents are piecemeal and sporadic:

http://confluence.atlassian.com/display/DOC/External+Database
http://confluence.atlassian.com/display/DOC/Database+Configuration
http://confluence.atlassian.com/display/DOC/Database+Setup+Guides
http://confluence.atlassian.com/display/DOC/Migrate+to+Another+Database

These four resources should be combined and streamlined. Remember to consider that installation and upgrade guides refer to this documentation.

Drafts in progress:

• https://confluence.atlassian.com/display/DOC/DRAFTdb+-+Migrating+to+Another+Database – first draft complete
• https://confluence.atlassian.com/display/DOC/DRAFTdb+-+Database+Setup+For+MySQL – first draft complete
• https://confluence.atlassian.com/display/DOC/DRAFTdb+-+Database+Setup+for+Oracle – first draft complete
• https://confluence.atlassian.com/display/DOC/DRAFTdb+-+Database+Setup+for+SQL+Server – first draft complete
• https://confluence.atlassian.com/display/DOC/DRAFTdb+-+Configuring+a+SQL+Server+Datasource+in+Apache+Tomcat – first draft complete
• https://confluence.atlassian.com/display/DOC/DRAFTdb+-+Database+Setup+for+PostgreSQL – first draft complete
• https://confluence.atlassian.com/display/DOC/DRAFTdb+-+Configuring+a+PostgreSQL+Datasource+in+Apache+Tomcat – first draft complete

New page in progress:

• https://confluence.atlassian.com/display/DOC/Configuring+an+Oracle+Datasource+in+Apache+Tomcat – -- first draft complete

Reviews:

• I've asked David Mason to review the two Oracle docs. Friday 26 April: He's happy with the docs. Suggested I combine the notes about needing to be a DBA.
• Held a meeting with Renan and David M on Wednesday 1 May for final review of the entire set. Just a few changes to make, now also applied.

Ready to publish!