Fix wrong Jenkins repositories keys (#89)

Fix the repositories public keys url for Jenkins (see https://pkg.jenkins.io/debian-stable/ and https://pkg.jenkins.io/debian/ )

jenkins/install_jenkins.sh

@@ -241,8 +241,9 @@ server {
 EOF
 )
 
-#update apt repositories
-wget -q -O - https://pkg.jenkins.io/debian/jenkins-ci.org.key | sudo apt-key add -
+# Add repositories public keys
+wget -q -O - https://pkg.jenkins.io/debian/jenkins.io.key | sudo apt-key add -
+wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -
 
 if [ "$jenkins_release_type" == "weekly" ]; then
   sudo sh -c 'echo deb http://pkg.jenkins.io/debian binary/ > /etc/apt/sources.list.d/jenkins.list'
@@ -478,4 +479,4 @@ retry_until_successful run_util_script "jenkins/run-cli-command.sh" -c "version"
 
 #install common tools
 sudo apt-get install git --yes
-sudo apt-get install azure-cli --yes
+sudo apt-get install azure-cli --yes