Added dataset stats jenkinsfile and script

Jenkinsfile_stats

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+pipeline {
+    agent any
+    parameters {
+        buildSelector(defaultSelector: lastSuccessful(), description: 'Which build to use for copying artifacts', name: 'BUILD_SELECTOR')
+    }
+    stages {
+        stage("Clone repo & print stats"){
+            steps {
+                copyArtifacts fingerprintArtifacts: true, projectName: 's434804-create-dataset', selector: buildParameter('BUILD_SELECTOR')
+                sh "chmod 777 ./stats.sh"
+                sh "./stats.sh"
+                archiveArtifacts "stats.txt"
+            }
+        }
+    }
+}

stats.sh

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+#!/bin/bash
+wc -l ./*.csv > ./stats.txt