try to solve gpg rvm problems

Author: dgsuarez

provision/install.sh

@@ -7,6 +7,7 @@ apt-get install -y curl
 
 #rvm
 gpg --keyserver hkp://keys.gnupg.net --recv-keys D39DC0E3
+\curl -sSL https://rvm.io/mpapis.asc | gpg --import -
 \curl -sSL https://get.rvm.io | bash -s stable
 source /etc/profile.d/rvm.sh
 rvm use --install --default 2.1.5