Refs #21114: Use correct branches of Fast DDS and Fast DDS Python in RTD

Signed-off-by: eduponz <eduardoponz@eprosima.com>

Author: EduPonz

docs/conf.py

@@ -216,22 +216,13 @@ def configure_doxyfile(
     fastdds_branch = os.environ.get('FASTDDS_BRANCH', None)
 
     # First try to checkout to ${FASTDDS_BRANCH}
-    # Else try with current documentation branch
-    # Else checkout to master
+    # Else checkout to 2.14.x
     if (fastdds_branch and
             fastdds.refs.__contains__('origin/{}'.format(fastdds_branch))):
         fastdds_branch = 'origin/{}'.format(fastdds_branch)
-    elif (docs_branch and
-            fastdds.refs.__contains__('origin/{}'.format(docs_branch))):
-        fastdds_branch = 'origin/{}'.format(docs_branch)
     else:
-        print(
-            'Fast DDS does not have either "{}" or "{}" branches'.format(
-                fastdds_branch,
-                docs_branch
-            )
-        )
-        fastdds_branch = 'origin/master'
+        fastdds_branch = 'origin/2.14.x'
+        print(f'Fast DDS branch is not set by env var. Using "{fastdds_branch}"')
 
     # Actual checkout
     print('Checking out Fast DDS branch "{}"'.format(fastdds_branch))
@@ -248,20 +239,14 @@ def configure_doxyfile(
     fastdds_python_branch = os.environ.get('FASTDDS_PYTHON_BRANCH', None)
 
     # First try to checkout to ${FASTDDS_PYTHON_BRANCH}
-    # Else try with current documentation branch
-    # Else checkout to master
+    # Else checkout to 1.4.x
     if (fastdds_python_branch and
             fastdds_python.refs.__contains__(
                 'origin/{}'.format(fastdds_python_branch))):
         fastdds_python_branch = 'origin/{}'.format(fastdds_python_branch)
-    elif (docs_branch and
-            fastdds_python.refs.__contains__('origin/{}'.format(docs_branch))):
-        fastdds_python_branch = 'origin/{}'.format(docs_branch)
     else:
-        print(
-            'Fast DDS Python does not have either "{}" or "{}" branches'
-            .format(fastdds_python_branch, docs_branch))
-        fastdds_python_branch = 'origin/main'
+        fastdds_python_branch = 'origin/1.4.x'
+        print(f'Fast DDS Python branch is not set by env var. Using "{fastdds_python_branch}"')
 
     # Actual checkout
     print('Checking out Fast DDS Python branch "{}"'.format(