DO-103_eva_api_class (#10)

Reviewed-on: https://git.avroid.tech/DevOps/jenkins-shared-lib/pulls/10
Co-authored-by: aleksandr.vodyanov <aleksandr.vodyanov@avroid.tech>
Co-committed-by: aleksandr.vodyanov <aleksandr.vodyanov@avroid.tech>

src/tech/avroid/api/Eva.groovy

@@ -27,9 +27,8 @@ class Eva implements Serializable {
      * @param parentId     String  - id of Object for which created link
      * @param linkName     String  - name of link
      * @param url          String  - full url of link
-     * @return              Boolean - success or failure create 
      */
-    public createLink(String parentId, String linkName, String url) {
+    public void createLink(String parentId, String linkName, String url) {
         Map body = [
             jsonrpc: "1.2",
             method: "CmfLink.create",
@@ -59,8 +58,12 @@ class Eva implements Serializable {
      */
     public String getTaskId(String filterValue, String filterParam = "code") {
         String response = getTask(filterValue, filterParam)
+        Object result = new JsonSlurper().parseText(response).result
         
-        return new JsonSlurper().parseText(response).result.id
+        if (result) {
+            return result.id
+        }
+        return null
     }
     
     /**