Use main branch of dependencies in backend main branch (#129)

Signed-off-by: RaulSanchez <raul@eprosima.com>

Author: rsanchez15

fastdds_statistics_backend.repos

@@ -10,11 +10,11 @@ repositories:
     fastdds:
         type: git
         url: https://github.com/eProsima/Fast-DDS.git
-        version: 2.3.x
+        version: master
     fastdds_statistics_backend:
         type: git
         url: https://github.com/eProsima/Fast-DDS-statistics-backend.git
-        version: v0.3.0
+        version: main
     fastrtpsgen:
         type: git
         url: https://github.com/eProsima/Fast-DDS-Gen.git