Move back to jjbb (#995)

* Removed Jenkins pipelines configuration

* Restored jjbb definitions

Author: delvedor

.ci/Jenkinsfile

@@ -0,0 +1,14 @@
+---
+- job:
+    name: elastic+elasticsearch-js+5.x
+    display-name: 'elastic / elasticsearch-js # 5.x'
+    description: Testing the elasticsearch-js 5.x branch.
+    parameters:
+    - string:
+        name: branch_specifier
+        default: refs/heads/5.x
+        description: the Git branch specifier to build (<branchName>, <tagName>,
+          <commitId>, etc.)
+    triggers:
+    - github
+    - timed: '@weekly'

.ci/jobs/elastic+elasticsearch-js+5.x.yml

@@ -0,0 +1,14 @@
+---
+- job:
+    name: elastic+elasticsearch-js+6.x
+    display-name: 'elastic / elasticsearch-js # 6.x'
+    description: Testing the elasticsearch-js 6.x branch.
+    parameters:
+    - string:
+        name: branch_specifier
+        default: refs/heads/6.x
+        description: the Git branch specifier to build (<branchName>, <tagName>,
+          <commitId>, etc.)
+    triggers:
+    - github
+    - timed: '@weekly'

.ci/jobs/elastic+elasticsearch-js+6.x.yml

@@ -0,0 +1,14 @@
+---
+- job:
+    name: elastic+elasticsearch-js+7.x
+    display-name: 'elastic / elasticsearch-js # 7.x'
+    description: Testing the elasticsearch-js 7.x branch.
+    parameters:
+    - string:
+        name: branch_specifier
+        default: refs/heads/7.x
+        description: the Git branch specifier to build (<branchName>, <tagName>,
+          <commitId>, etc.)
+    triggers:
+    - github
+    - timed: '@weekly'

.ci/jobs/elastic+elasticsearch-js+7.x.yml

@@ -0,0 +1,14 @@
+---
+- job:
+    name: elastic+elasticsearch-js+master
+    display-name: 'elastic / elasticsearch-js # master'
+    description: Testing the elasticsearch-js master branch.
+    parameters:
+    - string:
+        name: branch_specifier
+        default: refs/heads/master
+        description: the Git branch specifier to build (<branchName>, <tagName>,
+          <commitId>, etc.)
+    triggers:
+    - github
+    - timed: '@daily'

.ci/jobs/elastic+elasticsearch-js+master.yml

@@ -0,0 +1,19 @@
+---
+- job:
+    name: elastic+elasticsearch-js+pull-request
+    display-name: 'elastic / elasticsearch-js # pull-request'
+    description: Testing of elasticsearch-js pull requests.
+    scm:
+    - git:
+        branches:
+        - ${ghprbActualCommit}
+        refspec: +refs/pull/*:refs/remotes/origin/pr/*
+    triggers:
+    - github-pull-request:
+        org-list:
+        - elastic
+        allow-whitelist-orgs-as-admins: true
+        github-hooks: true
+        status-context: clients-ci
+        cancel-builds-on-update: true
+    publishers: []