change test env from get to post

OpenshotService/openshot_video_generator.py

@@ -806,7 +806,7 @@ class video_service(rpyc.Service):
     def exposed_call_video_gen(self,name_hash,name,text_content, image_urls,multiLang,avatar):
         print('ML:'+str(multiLang))#this is long video version,
         video_gen(name_hash,name,text_content, image_urls,multiLang,avatar)
-    def expose_make_speech(self,text):
+    def exposed_make_speech(self,text):
         make_speech(text)