Fix wrong condition in doCheckCredentialsId that show "Unregistered Server" as validation error message (#1051)

Author: nfalco79

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

@@ -1061,7 +1061,7 @@ public static FormValidation doCheckServerUrl(@AncestorInPath SCMSourceOwner con
                 return FormValidation.error(
                     "Unauthorized to validate Server URL"); // not supposed to be seeing this form
             }
-            if (BitbucketEndpointConfiguration.get().findEndpoint(value).isPresent()) {
+            if (!BitbucketEndpointConfiguration.get().findEndpoint(value).isPresent()) {
                 return FormValidation.error("Unregistered Server: " + value);
             }
             return FormValidation.ok();

src/main/java/com/cloudbees/jenkins/plugins/bitbucket/hooks/WebhookAutoRegisterListener.java

@@ -116,7 +116,7 @@ private void removeHooksAsync(final SCMSourceOwner owner) {
             public void doRun() {
                 try {
                     removeHooks(owner);
-                } catch (IOException | InterruptedException e) {
+                } catch (IOException e) {
                     LOGGER.log(Level.WARNING, "Could not deregister hooks for " + owner.getFullName(), e);
                 }
             }
@@ -185,7 +185,7 @@ private void registerHook(BitbucketSCMSource source) throws IOException {
         }
     }
 
-    private void removeHooks(SCMSourceOwner owner) throws IOException, InterruptedException {
+    private void removeHooks(SCMSourceOwner owner) throws IOException {
         List<BitbucketSCMSource> sources = getBitbucketSCMSources(owner);
         for (BitbucketSCMSource source : sources) {
             BitbucketApi bitbucket = bitbucketApiFor(source);