Add Jenkins pipeline for publishing snapshots

ci/snapshot-publish.Jenkinsfile

@@ -0,0 +1,58 @@
+@Library('hibernate-jenkins-pipeline-helpers@1.5') _
+
+// Avoid running the pipeline on branch indexing
+if (currentBuild.getBuildCauses().toString().contains('BranchIndexingCause')) {
+  print "INFO: Build skipped due to trigger being Branch Indexing"
+  currentBuild.result = 'ABORTED'
+  return
+}
+
+pipeline {
+    agent {
+        label 'Fedora'
+    }
+    tools {
+        jdk 'OpenJDK 11 Latest'
+    }
+    options {
+  		rateLimitBuilds(throttle: [count: 1, durationName: 'hour', userBoost: true])
+        buildDiscarder(logRotator(numToKeepStr: '3', artifactNumToKeepStr: '3'))
+    }
+    triggers {
+      cron 'H * * * *'
+    }
+	stages {
+        stage('Checkout') {
+        	steps {
+				checkout scm
+			}
+		}
+		stage('Publish') {
+			steps {
+				withCredentials([
+					usernamePassword(credentialsId: 'ossrh.sonatype.org', usernameVariable: 'hibernatePublishUsername', passwordVariable: 'hibernatePublishPassword'),
+					usernamePassword(credentialsId: 'plugins.gradle.org', usernameVariable: 'hibernatePluginPortalUsername', passwordVariable: 'hibernatePluginPortalPassword'),
+					string(credentialsId: 'ge.hibernate.org-access-key', variable: 'GRADLE_ENTERPRISE_ACCESS_KEY'),
+					string(credentialsId: 'release.gpg.passphrase', variable: 'SIGNING_PASS'),
+					file(credentialsId: 'release.gpg.private-key', variable: 'SIGNING_KEYRING')
+				]) {
+					sh """./gradlew clean publish \
+						-PhibernatePublishUsername=$hibernatePublishUsername \
+						-PhibernatePublishPassword=$hibernatePublishPassword \
+						-PhibernatePluginPortalUsername=$hibernatePluginPortalUsername \
+						-PhibernatePluginPortalPassword=$hibernatePluginPortalPassword \
+						--no-scan \
+						-DsigningPassword=$SIGNING_PASS \
+						-DsigningKeyFile=$SIGNING_KEYRING \
+					"""
+				}
+			}
+        }
+    }
+    post {
+        always {
+            // Space-separated
+            notifyBuildResult maintainers: 'christian.beikov@gmail.com'
+        }
+    }
+}