Endode string to UTF-8 for issue reportportal#11.

Author: krasoffski

robotframework_reportportal/model.py

@@ -54,10 +54,12 @@ def __init__(self, name=None, parent_type="SUITE", attributes=None):
             self.status = attributes["status"]
 
     def get_name(self):
-        assignment = "{0} = ".format(", ".join(self.assign)) if self.assign else ""
+        assign = ", ".join(self.assign)
+        assignment = "{0} = ".format(assign) if assign else ""
         arguments = ", ".join(self.args)
         full_name = "{0}{1} ({2})".format(assignment, self.name, arguments)
-        return full_name[:256]
+        short_name = full_name[:256]
+        return short_name.encode("utf8")
 
     def get_type(self):
         if self.keyword_type == "Setup":