Use Commons Lang 3 consistently (#1076)

Author: basil

src/main/java/jenkins/plugins/slack/ActiveNotifier.java

@@ -29,7 +29,7 @@
 import jenkins.plugins.slack.logging.BuildKey;
 import jenkins.plugins.slack.matrix.MatrixTriggerMode;
 import org.apache.commons.collections.CollectionUtils;
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.jenkinsci.plugins.displayurlapi.DisplayURLProvider;
 
 @SuppressWarnings("rawtypes")

src/main/java/jenkins/plugins/slack/CredentialsObtainer.java

@@ -12,7 +12,7 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import jenkins.model.Jenkins;
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.jenkinsci.plugins.plaincredentials.StringCredentials;
 import org.jenkinsci.plugins.workflow.steps.StepContext;
 import org.kohsuke.accmod.Restricted;

src/main/java/jenkins/plugins/slack/SlackNotifier.java

@@ -37,7 +37,7 @@
 import jenkins.plugins.slack.user.SlackUserIdResolverDescriptor;
 import net.sf.json.JSONArray;
 import net.sf.json.JSONObject;
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.jenkinsci.Symbol;
 import org.jenkinsci.plugins.displayurlapi.DisplayURLProvider;
 import org.jenkinsci.plugins.plaincredentials.StringCredentials;

src/main/java/jenkins/plugins/slack/user/EmailSlackUserIdResolver.java

@@ -35,7 +35,7 @@
 import java.util.logging.Level;
 import java.util.logging.Logger;
 import java.util.stream.Stream;
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.hc.client5.http.classic.methods.HttpGet;
 import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
 import org.apache.hc.client5.http.impl.classic.CloseableHttpResponse;

src/main/java/jenkins/plugins/slack/user/SlackUserIdResolver.java

@@ -42,7 +42,7 @@
 import java.util.stream.Collectors;
 import jenkins.model.Jenkins;
 import jenkins.scm.RunWithSCM;
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
 
 public abstract class SlackUserIdResolver extends AbstractDescribableImpl<SlackUserIdResolver> implements ExtensionPoint {

src/main/java/jenkins/plugins/slack/workflow/SlackResponse.java

@@ -2,7 +2,7 @@
 
 import java.io.Serializable;
 import jenkins.plugins.slack.SlackService;
-import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.jenkinsci.plugins.scriptsecurity.sandbox.whitelists.Whitelisted;
 import org.json.JSONObject;