Update Foonathan-Memory-Vendor, Fast CDR and Fast DDS main branches (#450)

Signed-off-by: Raul Sanchez-Mateos <raul@eprosima.com>

Author: rsanchez15

ddsrouter.repos

@@ -2,15 +2,15 @@ repositories:
     foonathan_memory_vendor:
         type: git
         url: https://github.com/eProsima/foonathan_memory_vendor.git
-        version: master
+        version: v1.3.1
     fastcdr:
         type: git
         url: https://github.com/eProsima/Fast-CDR.git
-        version: master
+        version: 2.x
     fastdds:
         type: git
         url: https://github.com/eProsima/Fast-DDS.git
-        version: master
+        version: 2.x
     dev-utils:
         type: git
         url: https://github.com/eProsima/dev-utils.git