OBMFULL-5632 Close JDBC connection when Exception occured during its configuration

Conflicts:
	java/sync/dbcp/src/main/java/org/obm/dbcp/DatabaseConnectionProviderImpl.java
	java/sync/dbcp/src/test/java/org/obm/dbcp/DatabaseConnectionProviderImplTest.java
	java/sync/dbcp/src/test/java/org/obm/dbcp/DatabaseConnectionProviderInitTest.java
OBMFULL-5632 Add DatabaseConnectionProvider integration test
OBMFULL-5645 use a single httpclient connection pool for solr
OBMFULL-5635 enable hornetq messages paging to avoid dangerous memory consumption