Adds a user to a specified issue's watcher list

        Arguments:
            |  issue (string)  		| A JIRA Issue that a user needs to be assigned to, can be an issue ID or Key		|
            |  JIRAUsername (string)  	| A JIRA Username to assign a user to an issue   									|

        Example:
           |  *Keyword*        		|  *Parameters* | 									|
           |  connect to jira       |  asimmons     | options= {'http://devjira01'}     |
           |  ${issue}				|  create issue |  ${issue_field_dict}				|
           |  assign user to issue	|  ${issue}		|  aSample 							|

def assign_user_to_issue(self, issue, JIRAUsername):
    # TODO: Review docs
        """
        Adds a user to a specified issue's watcher list

        Arguments:
            |  issue (string)  		| A JIRA Issue that a user needs to be assigned to, can be an issue ID or Key		|
            |  JIRAUsername (string)  	| A JIRA Username to assign a user to an issue   									|

        Example:
           |  *Keyword*        		|  *Parameters* | 									|
           |  connect to jira       |  asimmons     | options= {'http://devjira01'}     |
           |  ${issue}				|  create issue |  ${issue_field_dict}				|
           |  assign user to issue	|  ${issue}		|  aSample 							|
        """
        self.jira.assign_issue(issue=issue, assignee=JIRAUsername)