Fix key conflict

vars/addVersionFromNexusRepo.groovy

@@ -1,6 +1,15 @@
 #!/usr/bin/env groovy
 
-// import java.net.URLEncoder
+/*
+Calculate the current version by querying a list of assets in a Nexus Repository. 
+Return '0.0.1' if there are no matching assets. 
+
+Jenkins Plugin dependencies:
+
+- HTTP Request
+- Plugin Utilty Steps
+
+*/
 
 Map call(Map config = [:]) {
     Map defaults = [
@@ -15,10 +24,18 @@ Map call(Map config = [:]) {
     Map runConfig = defaults + config
 
     nexusURL = runConfig.nexusBase + '/' + runConfig.searchAPI
-
     nexusSearch = buildUrlWithQueryParams(nexusURL, runConfig.queryParams)
 
+    response = httpRequest acceptType: 'APPLICATION_JSON',
+      contentType: 'APPLICATION_JSON',
+      url: nexusSearch,
+      wrapAsMultipart: false
+    body = response.content
+    assets = readJSON text: body
+    latest = assets.items.last()
     runConfig.nexusQuery = nexusSearch
+    runConfig.latestVersion = latest.name
+
     return runConfig
 }