Java env builder with Maven (#783)

Java environment builder with support for Maven builds. Default build comman runs `mvn clean package` and picks up target/*with-dependencies.jar for function.

test/tests/test_environments/test_java_builder.sh

@@ -0,0 +1,75 @@
+#!/bin/bash
+
+set -euo pipefail
+
+ROOT=$(dirname $0)/../../..
+
+cleanup() {
+    fission fn delete --name pbuilderhello
+    fission fn delete --name nbuilderhello
+    fission env delete --name java
+}
+
+test_fn() {
+    echo "Checking for valid response"
+
+    while true; do
+      response0=$(curl http://$FISSION_ROUTER/$1)
+      echo $response0 | grep -i $2
+      if [[ $? -eq 0 ]]; then
+        break
+      fi
+      sleep 1
+    done
+}
+
+test_pkg() {
+    echo "Checking for valid response"
+
+    while true; do
+      response0=$(kubectl get -ndefault package $1 -o=jsonpath='{.status.buildstatus}')
+      echo $response0 | grep -i $2
+      if [[ $? -eq 0 ]]; then
+        break
+      fi
+      sleep 1
+    done
+}
+
+export -f test_fn
+export -f test_pkg
+
+cd $ROOT/examples/jvm/java
+
+log "Creating zip from source code"
+zip -r java-src-pkg.zip *
+
+log "Creating Java environment with Java Builder"
+fission env create --name java --image gcr.io/fission-ci/jvm-env:test --version 2 --keeparchive --builder gcr.io/fission-ci/jvm-env-builder:test
+
+log "Creating package from the source archive"
+pkg_name=`fission package create --sourcearchive java-src-pkg.zip --env java|cut -d' ' -f 2|cut -d"'" -f 2`
+log "Created package $pkg_name"
+
+log "Checking the status of package"
+timeout 300 bash -c "test_pkg $pkg_name 'succeeded'"
+
+log "Creating pool manager & new deployment function for Java"
+fission fn create --name nbuilderhello --pkg $pkg_name --env java --entrypoint io.fission.HelloWorld --executortype newdeploy --minscale 1 --maxscale 1
+fission fn create --name pbuilderhello --pkg $pkg_name --env java --entrypoint io.fission.HelloWorld
+trap cleanup EXIT
+
+log "Creating route for pool manager function"
+fission route create --function pbuilderhello --url /pbuilderhello --method GET
+
+log "Creating route for new deployment function"
+fission route create --function nbuilderhello --url /nbuilderhello --method GET
+
+log "Waiting for router & pools to catch up"
+sleep 5
+
+log "Testing pool manager function"
+timeout 60 bash -c "test_fn pbuilderhello 'Hello'"
+
+log "Testing new deployment function"
+timeout 60 bash -c "test_fn nbuilderhello 'Hello'"