Add JSON responses for /machines and daily report.

Change-Id: I0bb576770202ecbed92cde4ae8ce4f5ab8729a42

Author: georges-arm

lnt/server/ui/views.py

@@ -273,6 +273,9 @@ def v4_machines():
     ts = request.get_testsuite()
     machines = session.query(ts.Machine).order_by(ts.Machine.name)
 
+    if prefer_json_response(request):
+        return flask.jsonify(machines.all())
+
     return render_template("all_machines.html", machines=machines,
                            **ts_data(ts))
 
@@ -1538,6 +1541,9 @@ def v4_daily_report(year, month, day):
     except ValueError:
         return abort(400)
 
+    if prefer_json_response(request):
+        return flask.jsonify(report)
+
     return render_template("v4_daily_report.html", report=report,
                            analysis=lnt.server.reporting.analysis,
                            **ts_data(ts))