Fixes #310 by Edited the ConditionalMapping Class issue number 310

[pathi108]

-made tempory graph for each matching conditional mapping type
-merged all the graphs with the default mapping and return the final graph

[jimkont]

Thanks @pathi108, can you explain in more detail what this PR changes? E.g. quads/graph with the previous code vs the your code?

[pathi108]

1 var matched = false
2   val graph=Seq.empty
3  for(condition <- cases)
4   {
5    if (condition.matches(node)) {
6     matched=true 
7        val tempGraph = condition.extract(node, subjectUri, pageContext)
8        graph ++ tempGraph
9      }
10    }
11    if(matched){
 12     val instanceURI = node.getAnnotation(TemplateMapping.INSTANCE_URI_ANNOTATION).getOrElse(throw new IllegalArgumentException("missing instance URI"))
      return graph ++ defaultMappings.flatMap(_.extract(node, instanceURI, pageContext))
14    }
    graph
  }

In my code the I will check for all cases(line 3 and line 5) in the conditional mapping whether the tempelate node will match with the condition if it so it will extract data using that conditon in the mapping and create a tempry grap(line 7)h .then all these tempory graphs will be added to one graph as a sequence. (line 8).then if atleast one conditon maps it will create get the instance uri and extractdata using the default mapping and append them to the end of the graph and return the graph