Update to m2e 1.7 and m2e-wtp 1.3

As announced a week ago [1], m2e 1.7 is available.

[1] http://lists.jboss.org/pipermail/jbosstools-dev/2015-November/010757.html

So, I suppose we should updated the JBT 4.4 and JBDS 10.0 target platforms to include this new version.

Luckily, the m2e bits are already in Neon M3 so no new mirror is needed; but I need to know if there are any other m2e-* pieces which ALSO need to be updated in lock-step at the same time.

https://github.com/jbosstools/jbosstools-target-platforms/blob/4.60.x/jbdevstudio/multiple/jbdevstudio-multiple.target#L79-L106
https://github.com/jbosstools/jbosstools-target-platforms/blob/4.60.x/jbosstools/multiple/jbosstools-multiple.target#L89-L111

Please clarify which m2e-* projects also need updating, or if in fact we ONLY want to include m2e 1.7 instead of 1.62, and change none of the rest of the m2e family.

Also, if this change should be backported to the Mars-based target platforms for JBT 4.3.x / JBDS 9.x, let me know that too.