Update certain dependencies to IO platform versions

[philwebb]

Groovy 2.2.2 (currently 2.2.1)
Jackson 2.3.2 (currently 2.3.1)
JSTL 1.2.1 (currently 1.2)
Reactor 1.0.1.RELEASE (currently 1.0.0.RELEASE)

Note JSTL has new coords:
http://central.maven.org/maven2/javax/servlet/jsp/jstl/javax.servlet.jsp.jstl-api/1.2.1/

[philwebb]

Groovy 2.2.2 seems to break our @Grab and jar support.