fix travis config where distro=bionic was missing (#2672)

diff --git a/.travis.yml b/.travis.yml
index 9b00fc6..7cd5b2d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -117,9 +117,17 @@
 
     # ------------------------- phase: autotools --------------------
     # TODO: Remove them once migrated to CMake
+
+    - script: build/docker/run.sh
+      env:
+        - JOB="Autotools (Ubuntu Focal)"
+        - DISTRO=ubuntu-focal
+        - SCRIPT="autotools.sh"
+
     - script: build/docker/run.sh
       env:
         - JOB="Autotools (Ubuntu Bionic)"
+        - DISTRO=ubuntu-bionic
         - SCRIPT="autotools.sh"
 
     - script: build/docker/run.sh
@@ -128,12 +136,6 @@
         - DISTRO=ubuntu-xenial
         - SCRIPT="autotools.sh"
 
-    - script: build/docker/run.sh
-      env:
-        - JOB="Autotools (Ubuntu Focal)"
-        - DISTRO=ubuntu-focal
-        - SCRIPT="autotools.sh"
-
     # ------------------------- phase: cmake ------------------------
     - script: build/docker/run.sh
       env: