Add sonar support, do some no risk changes

Changes include adding equals+hashCode to DTOs, fixing test assertions, and adding some accessibility to HTML templates.

src/main/java/org/eclipsefoundation/git/eca/api/models/Project.java

@@ -30,7 +30,7 @@ import com.google.auto.value.extension.memoized.Memoized;
  *
  */
 @AutoValue
-@JsonDeserialize(builder = AutoValue_Project.Builder.class)
+@JsonDeserialize(builder = $AutoValue_Project.Builder.class)
 public abstract class Project {
     public abstract String getProjectId();
 
@@ -125,7 +125,7 @@ public abstract class Project {
 
     @AutoValue
     @JsonDeserialize(builder = AutoValue_Project_GitlabProject.Builder.class)
-    public static abstract class GitlabProject {
+    public abstract static class GitlabProject {
         public abstract String getProjectGroup();
 
         public abstract List<String> getIgnoredSubGroups();