Dependency test related fixes needed for eloquent release. (#1425)

* Update rosdep in docker build

* Adding missing dependency

full_ros_build.Dockerfile

@@ -63,6 +63,8 @@ RUN wget https://raw.githubusercontent.com/ros2/ros2/$ROS2_BRANCH/ros2.repos \
 # get skip keys
 COPY ./tools/skip_keys.txt ./
 
+RUN rosdep update
+
 # copy underlay manifests
 COPY --from=cache /tmp/underlay_ws src/underlay
 RUN cd src/underlay && colcon list --names-only | \

nav2_system_tests/package.xml

@@ -53,6 +53,7 @@
   <test_depend>ament_lint_common</test_depend>
   <test_depend>ament_lint_auto</test_depend>
   <test_depend>ament_cmake_gtest</test_depend>
+  <test_depend>ament_cmake_pytest</test_depend>
   <test_depend>launch</test_depend>
   <test_depend>launch_ros</test_depend>
   <test_depend>launch_testing</test_depend>

release_branch.Dockerfile

@@ -11,6 +11,8 @@
 ARG FROM_IMAGE=dashing
 FROM ros:$FROM_IMAGE
 
+RUN rosdep update
+
 # copy ros package repo
 ENV NAV2_WS /opt/nav2_ws
 RUN mkdir -p $NAV2_WS/src