Conditionally loading beans should refer to POM-maintained versions

[mks-d]

We need to avoid this kind of thing:

@OpenmrsProfile(openmrsPlatformVersion = "2.2.0")

Because this version is already specified here in a POM file leading to a "double maintenance" problem.

All those POM versions should be made available in the Java code through a mechanism like the one described here: https://stackoverflow.com/a/3697482/321797 Any better idea is welcome.