[NXCM-4485] Use nexsu-p2-bridge-plugin 2.1.1-SNAPSHOT and maven-p2-bridge-plugin 1.1.6-SNAPSHOT

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Merge pull request #26 from sonatype/nxcm-4485-use-nexus-temp-dir

TRIVIAL: [NXCM-4485] Use nexsu-p2-bridge-plugin 2.1.1-SNAPSHOT and maven-p2-bridge-plugin 1.1.6-SNAPSHOT