[MRELEASE-896] Depcreate and disable useReleaseProfile

There are some indications [1, 2] that the release-profile will disappear from Maven's super POM somewhen in the future. There was also an attempt back in 2009 to remove it but it was re-added again [3].
In order to support the removal of this profile, I suggest to disable its default activation in the maven-release-plugin. Additionally, I suggest to deprecate the useReleaseProfile parameter in the PerformReleaseMojo.

[1] https://github.com/apache/maven/blob/master/maven-model-builder/src/main/resources/org/apache/maven/model/pom-4.0.0.xml#L100
[2] http://mail-archives.apache.org/mod_mbox/maven-dev/201411.mbox/%3c20141128002840.32FCB4340A7F@dd34514.kasserver.com%3e
[3] https://github.com/apache/maven/commit/3870ab0e6021eb17d04883f97fe144d2db96e745