Add devfile with java sample based on google cloud sample (#135)

* Add java-guestbook sample

Signed-off-by: svor <vsvydenk@redhat.com>

devfiles/java-mongo/devfile.yaml

@@ -0,0 +1,121 @@
+---
+apiVersion: 1.0.0
+metadata:
+  generateName: java-mongo-
+projects:
+-
+  name: java-guestbook
+  source:
+    type: git
+    location: "/~https://github.com/che-samples/java-guestbook.git"
+components:
+-
+  type: chePlugin
+  id: redhat/java/latest
+  memoryLimit: 1280MiB
+-
+  type: dockerimage
+  alias: maven
+  image: quay.io/eclipse/che-java8-maven:nightly
+  env:
+  - name: JAVA_OPTS
+    value: "-XX:MaxRAMPercentage=50.0 -XX:+UseParallelGC -XX:MinHeapFreeRatio=10
+          -XX:MaxHeapFreeRatio=20 -XX:GCTimeRatio=4 -XX:AdaptiveSizePolicyWeight=90
+          -Dsun.zip.disableMemoryMapping=true -Xms20m -Djava.security.egd=file:/dev/./urandom
+          -Duser.home=/home/user"
+  - name: MAVEN_OPTS
+    value: $(JAVA_OPTS)
+  memoryLimit: 512Mi
+  mountSources: true
+  endpoints:
+  - name: java-guestbook-backend
+    attributes:
+      discoverable: 'true'
+      public: 'false'
+    port: 8080
+  - name: java-guestbook
+    attributes:
+      discoverable: 'true'
+      public: 'true'
+    port: 8443
+  volumes:
+  - name: m2
+    containerPath: /home/user/.m2
+-
+  type: dockerimage
+  alias: mongo
+  image: centos/mongodb-34-centos7
+  env:
+  - name: MONGODB_USER
+    value: user
+  - name: MONGODB_PASSWORD
+    value: password
+  - name: MONGODB_DATABASE
+    value: guestbook
+  - name: MONGODB_ADMIN_PASSWORD
+    value: password
+  memoryLimit: 300Mi
+  endpoints:
+  - name: java-guestbook-mongodb
+    attributes:
+      discoverable: 'true'
+      public: 'false'
+    port: 27017
+commands:
+-
+  name: maven build backend
+  actions:
+  -
+    type: exec
+    component: maven
+    command: "mvn clean install"
+    workdir: "${CHE_PROJECTS_ROOT}/java-guestbook/backend"
+-
+  name: maven build frontend
+  actions:
+  - type: exec
+    component: maven
+    command: "mvn clean install"
+    workdir: "${CHE_PROJECTS_ROOT}/java-guestbook/frontend"
+-
+  name: run backend
+  actions:
+  -
+    type: exec
+    component: maven
+    command: |
+      java -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5006,quiet=y \
+      -jar target/backend-1.0.jar
+    workdir: "${CHE_PROJECTS_ROOT}/java-guestbook/backend"
+-
+  name: run frontend
+  actions:
+  - type: exec
+    component: maven
+    command: |
+      java -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005,quiet=y \
+      -jar target/frontend-1.0.jar
+    workdir: "${CHE_PROJECTS_ROOT}/java-guestbook/frontend"
+-
+  name: Debug remote
+  actions:
+  - type: vscode-launch
+    referenceContent: |
+      {
+      "version": "0.2.0",
+      "configurations": [
+        {
+          "type": "java",
+          "name": "Debug (Attach) - Backend",
+          "request": "attach",
+          "hostName": "localhost",
+          "port": 5006
+        },
+        {
+          "type": "java",
+          "name": "Debug (Attach) - Frontend",
+          "request": "attach",
+          "hostName": "localhost",
+          "port": 5005
+        }]
+      }

devfiles/java-mongo/meta.yaml

@@ -0,0 +1,6 @@
+---
+displayName: Java with Spring Boot and MongoDB
+description: Java stack with OpenJDK 8, MongoDB and Spring Boot Guestbook demo application
+tags: ["Java", "OpenJDK", "Maven", "Spring Boot", "MongoDB"]
+icon: https://www.eclipse.org/che/images/logo-eclipseche.svg
+globalMemoryLimit: 2884Mi