Change colcon.pkg dependencies to be test-dependencies (#293) (#295)

* Change colcon.pkg dependencies to be test-dependencies (#293)

The dependencies on ament_cmake, ament_cmake_gtest, and
googletest-distribution are only needed when building
for tests, so we should only inject them as test dependencies.

Signed-off-by: Chris Lalancette <[email protected]>
(cherry picked from commit 88eb2ab)

# Conflicts:
#	colcon.pkg

* Fix conflicts

Signed-off-by: Miguel Company <[email protected]>

---------

Signed-off-by: Miguel Company <[email protected]>
Co-authored-by: Chris Lalancette <[email protected]>
Co-authored-by: Miguel Company <[email protected]>

Author: 3 people

colcon.pkg

@@ -1,5 +1,8 @@
-{
-    "name": "fastcdr",
-    "type": "cmake",
-    "dependencies" : ["googletest-distribution"]
-}
+name: fastcdr
+type: cmake
+test-dependencies:
+    # Needed for test compilation in ROS 2 CI
+    - ament_cmake_gtest
+    - ament_cmake
+    # Needed for test compilation in eProsima CI
+    - googletest-distribution