Add steps to build, deploy and test docker containers based on ArmarXGui

docker/armarx-workspace.json

+{
+  "modules": {
+    "armarx/RobotAPI": {}
+  },
+  "global": {
+    "prepare": {
+      "cmake": {
+        "definitions": {
+          "CMAKE_BUILD_TYPE": "RelWithDebInfo"
+        }
+      }
+    }
+  }
+}