v3.1.0

This release includes support for multiple instances of mod-oai-pmh deployed and connecting the databse with spring DI

• [MODOAIPMH-191] - Connect the database to mod-oai-pmh
• [MODOAIPMH-202] - Modify data retrieval from OAI-PMH view
• [MODOAIPMH-203] - Enable Spring DI for mod-oai-pmh
• [MODOAIPMH-213] - Maven build test phase fails