[feature/pr-template] Add pr template based on the contribution.md
[feature/pr-template] Add pr template based on the contribution.md

scherler/jenkins-plugin-site,gusreiber/OSS-plugin-site,gusreiber/jenkins-plugin-site,gusreiber/OSS-plugin-site,scherler/jenkins-plugin-site,gusreiber/jenkins-plugin-site,scherler/jenkins-plugin-site,gusreiber/OSS-plugin-site,gusreiber/jenkins-plugin-site