[JENKINS-644418] Add exponential backoff to BitBucket rate limit retr…

…y loop

Configure Apache HTTP client to use an exponential backoff retry strategy

.gitignore

@@ -17,3 +17,4 @@ work
 
 # VSCode
 .factorypath
+META-INF/

src/main/java/com/cloudbees/jenkins/plugins/bitbucket/BitbucketBuildStatusNotifications.java

@@ -172,7 +172,7 @@ private static void createStatus(@NonNull Run<?, ?> build, @NonNull TaskListener
 
     private static @CheckForNull BitbucketSCMSource findBitbucketSCMSource(Run<?, ?> build) {
         SCMSource s = SCMSource.SourceByItem.findSource(build.getParent());
-        return s instanceof BitbucketSCMSource ? (BitbucketSCMSource) s : null;
+        return s instanceof BitbucketSCMSource scm ? scm : null;
     }
 
     private static void sendNotifications(BitbucketSCMSource source, Run<?, ?> build, TaskListener listener)
@@ -211,12 +211,11 @@ private static void sendNotifications(BitbucketSCMSource source, Run<?, ?> build
 
     @CheckForNull
     private static String getHash(@CheckForNull SCMRevision revision) {
-        if (revision instanceof PullRequestSCMRevision) {
-            // unwrap
-            revision = ((PullRequestSCMRevision) revision).getPull();
+        if (revision instanceof PullRequestSCMRevision prRevision) {
+            revision = prRevision.getPull();
         }
-        if (revision instanceof AbstractGitSCMSource.SCMRevisionImpl) {
-            return ((AbstractGitSCMSource.SCMRevisionImpl) revision).getHash();
+        if (revision instanceof AbstractGitSCMSource.SCMRevisionImpl scmRevision) {
+            return scmRevision.getHash();
         }
         return null;
     }

src/main/java/com/cloudbees/jenkins/plugins/bitbucket/api/BitbucketBuildStatus.java

@@ -24,6 +24,7 @@
 package com.cloudbees.jenkins.plugins.bitbucket.api;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
+import edu.umd.cs.findbugs.annotations.NonNull;
 import org.apache.commons.codec.digest.DigestUtils;
 import org.kohsuke.accmod.Restricted;
 import org.kohsuke.accmod.restrictions.DoNotUse;
@@ -99,6 +100,20 @@ public BitbucketBuildStatus(String hash, String description, Status state, Strin
         this.name = name;
     }
 
+    /**
+     * Copy constructor.
+     * 
+     * @param other from copy to.
+     */
+    public BitbucketBuildStatus(@NonNull BitbucketBuildStatus other) {
+        this.hash = other.hash;
+        this.description = other.description;
+        this.state = other.state;
+        this.url = other.url;
+        this.key = other.key;
+        this.name = other.name;
+    }
+
     public String getHash() {
         return hash;
     }