Update maintainer listing: add Miguel (ros-industrial/universal_robot…

…#410)

* Add Migual Prada as maintainer.

* Sort maintainers alphabetically.

* Fix maintainers and author listing in all e-series pkgs.

Was missing from ros-industrial/universal_robot#380.

package.xml

@@ -6,8 +6,9 @@
 
   <author>Andrew Glusiec</author>
   <author>Felix Messmer</author>
-  <maintainer email="nhg@ipa.fhg.de">Nadia Hammoudeh Garcia</maintainer>
   <maintainer email="g.a.vanderhoorn@tudelft.nl">G.A. vd. Hoorn</maintainer>
+  <maintainer email="miguel.prada@tecnalia.com">Miguel Prada Sarasola</maintainer>
+  <maintainer email="nhg@ipa.fhg.de">Nadia Hammoudeh Garcia</maintainer>
 
   <license>BSD</license>