results: Fix dashboard_fetch_tree_list() invocation

Commit d45d0db ("Format error as json when using --json") added a new
positional argument called "use_json" to the dashboard_api_fetch()
method while fixing something else.

As part of the change, most of the callers of the dashboard_api_fetch(),
such as the dashboard_fetch_tree_list() helper, were updated to correctly
pass the new argument around.

However, the cmd_list_trees() was not updated to pass the new argument
correctly to the aforementioned helper function, which it uses internally.

As such, when using kci-dev with the "results trees" subcommand, this
results in a TypeError as follows:

  TypeError: dashboard_fetch_tree_list() missing 1 required positional argument: 'use_json'

Thus, add the missing argument when invoking dashboard_fetch_tree_list()
to fix the subcommand invocation error.

Signed-off-by: Krzysztof Wilczyński <krzysztof.wilczynski@collabora.com>

Author: Krzysztof Wilczyński

kcidev/subcommands/results/parser.py

@@ -125,7 +125,7 @@ def get_command_summary(command_data):
 
 
 def cmd_list_trees(origin, use_json):
-    trees = dashboard_fetch_tree_list(origin)
+    trees = dashboard_fetch_tree_list(origin, use_json)
     if use_json:
         kci_msg(json.dumps(list(map(lambda t: create_tree_json(t), trees))))
         return