myjenkins: Do not install plugin "ghprb" (#260)
myjenkins: Do not install plugin "ghprb" (#260)

Fix https://github.com/gmacario/easy-jenkins/issues/258

Signed-off-by: Gianpaolo Macario <f8885408b8c3d931b330bae3c3a28a3af912c463@gmail.com>
gmacario/easy-jenkins