Fix variable name.

Jenkinsfile

@@ -94,7 +94,7 @@ def analyzeDependency(modules2deps, artifacts2projects, report, artifact, depth)
     // then we look for the projects that build the downstream dependencies and finally we go recursive
     if (report['downstream_modules'][level][artifact]['dependencies']) {
         def nextDepth = ++depth
-        report['downstream_modules']["L${nextDeep}"] = [:]
+        report['downstream_modules']["L${nextDepth}"] = [:]
         report['downstream_modules'][level][artifact]['dependencies'].each { d ->
             report['downstream_modules'][level][artifact]['projects'] << artifacts2projects[d]
             report['downstream_projects'] << artifacts2projects[d]