Take advantage of Spring 3.1 profiles

[loicfrering]

Think of different profiles for different persistence technologies:

• data-jpa
• data-jpa-pgsql
• data-jpa-mysql
• data-jpa-h2
• data-mongodb
• data-graph

A profile should ne available to enable RESThub caching facilities.

Another one to enable monitoring thanks to JMX.

[jvillanti]

Split issue into two issues :

• this issue for "dynamic elements" (like JMX activation, cache, ...) with Spring 3.1 profiles
• second issue for the choice of tecnologies (like JPA/MongoDB, etc.) (see #43)

[sdeleuze]

I am in favor of using this before 2.0 release in order to replace

by jpa and webserver profiles ...