pom.xml(maven-{surefire,failsafe}-plugin): updated to 2.16

@see http://mail-archives.apache.org/mod_mbox/maven-announce/201308.mbox/%3CCAK2FUK0LYQxYSZx-SApqZXCVGEOnJ62iZd6jhtj_997AjfOiLg@mail.gmail.

No functional changes.
pom.xml(jetty-maven-plugin): updated to 8.1.14.v20131031

@see http://dev.eclipse.org/mhonarc/lists/jetty-announce/msg00040.html (8.1.9.v20130131)
@see http://dev.eclipse.org/mhonarc/lists/jetty-announce/msg00044.html (8.1.10.v20130312)
@see http://dev.eclipse.org/mhonarc/lists/jetty-announce/msg00050.html (8.1.11.v20130520)
@see http://dev.eclipse.org/mhonarc/lists/jetty-announce/msg00052.html (8.1.12.v20130726)
@see http://dev.eclipse.org/mhonarc/lists/jetty-announce/msg00058.html (8.1.14.v20131031)

No functional changes.