Create a link between two issues.

            Arguments:
                |  link_type (string)  	| The type of link									|
                |  inwardissue (string)  	| The issue to link from  							|
                |  outwardissue (string)  	| The issue to link to 								|
                |  comment (string)  		| (Optional) A comment to add when joining issues	|

            Example:
                |  *Keyword*        	|  *Parameters* | 									| 			|
                |  connect to jira      |  asimmons     | options= {'http://devjira01'}     |  			|
                |  ${issue}				|  create issue |  ${issue_field_dict}				|  True 	|
                |  create issue link	|  relates to   |  ${issue} 						|  PROJ-385	|

def create_issue_link(self, link_type, inwardissue,
                          outwardissue, comment=None):
        """
        Create a link between two issues.

            Arguments:
                |  link_type (string)  	| The type of link									|
                |  inwardissue (string)  	| The issue to link from  							|
                |  outwardissue (string)  	| The issue to link to 								|
                |  comment (string)  		| (Optional) A comment to add when joining issues	|

            Example:
                |  *Keyword*        	|  *Parameters* | 									| 			|
                |  connect to jira      |  asimmons     | options= {'http://devjira01'}     |  			|
                |  ${issue}				|  create issue |  ${issue_field_dict}				|  True 	|
                |  create issue link	|  relates to   |  ${issue} 						|  PROJ-385	|
        """
        self.jira.create_issue_link(type=link_type,
                                    inwardIssue=str(inwardissue),
                                    outwardIssue=str(outwardissue))