e2e: java driver isolation tests

e2e/isolation/input/alloc_exec_java.nomad

@@ -0,0 +1,39 @@
+job "java_sleep" {
+  datacenters = ["dc1"]
+  type = "batch"
+
+  group "java" {
+
+    task "build" {
+      lifecycle {
+        hook = "prestart"
+        sidecar = false
+      }
+
+      driver = "exec"
+      config {
+        command = "javac"
+        args = ["-d", "${NOMAD_ALLOC_DIR}", "local/Sleep.java"]
+      }
+
+      template {
+        destination = "local/Sleep.java"
+        data = <<EOH
+public class Sleep {
+    public static void main(String... s) throws Exception {
+        Thread.sleep(30000);
+    }
+}
+EOH
+      }
+    }
+
+    task "sleep" {
+      driver = "java"
+      config {
+        class_path = "${NOMAD_ALLOC_DIR}"
+        class = "Sleep"
+      }
+    }
+  }
+}