StashBuildTrigger: Rename StashBuildTriggerDescriptor to DescriptorImpl

DescriptorImpl is the standard name for a descriptor defined as an inner
class. StashBuildTriggerDescriptor is a long name that duplicates the
name of its containing class, StashBuildTrigger.

Author: proski

src/main/java/stashpullrequestbuilder/stashpullrequestbuilder/StashBuildTrigger.java

@@ -55,8 +55,7 @@ public class StashBuildTrigger extends Trigger<Job<?, ?>> {
 
   private transient StashPullRequestsBuilder stashPullRequestsBuilder;
 
-  @Extension
-  public static final StashBuildTriggerDescriptor descriptor = new StashBuildTriggerDescriptor();
+  @Extension public static final DescriptorImpl descriptor = new DescriptorImpl();
 
   @DataBoundConstructor
   public StashBuildTrigger(
@@ -229,8 +228,8 @@ public boolean getOnlyBuildOnComment() {
     return onlyBuildOnComment;
   }
 
-  public static final class StashBuildTriggerDescriptor extends TriggerDescriptor {
-    public StashBuildTriggerDescriptor() {
+  public static final class DescriptorImpl extends TriggerDescriptor {
+    public DescriptorImpl() {
       load();
     }
 

src/test/java/stashpullrequestbuilder/stashpullrequestbuilder/StashBuildTriggerTest.java

@@ -14,7 +14,6 @@
 import org.mockito.junit.MockitoJUnitRunner;
 import org.mockito.junit.MockitoRule;
 import org.mockito.quality.Strictness;
-import stashpullrequestbuilder.stashpullrequestbuilder.StashBuildTrigger.StashBuildTriggerDescriptor;
 
 @RunWith(MockitoJUnitRunner.class)
 public class StashBuildTriggerTest {
@@ -24,7 +23,7 @@ public class StashBuildTriggerTest {
 
   @Test
   public void check_getters() throws Exception {
-    StashBuildTriggerDescriptor descriptor = StashBuildTrigger.descriptor;
+    StashBuildTrigger.DescriptorImpl descriptor = StashBuildTrigger.descriptor;
 
     // Field names from config.jelly
     Iterable<String> properties =