Add bom generation

- Create new module spring-security-kerberos-bom
  which handles bom generation via BomPlugin.
- Relates #165

buildSrc/src/main/java/org/springframework/security/kerberos/gradle/BomPlugin.java

@@ -33,7 +33,7 @@ class BomPlugin implements Plugin<Project> {
 		pluginManager.apply(JavaPlatformPlugin.class);
 		new ArtifactoryConventions().apply(project);
 
-		// bom should have main shell modules and starters
+		// bom should have modules
 		DependencyConstraintHandler constraints = project.getDependencies().getConstraints();
 		project.getRootProject().getAllprojects().forEach(p -> {
 			p.getPlugins().withType(ModulePlugin.class, m -> {

buildSrc/src/main/java/org/springframework/security/kerberos/gradle/SpringMavenPlugin.java

@@ -104,9 +104,9 @@ public class SpringMavenPlugin implements Plugin<Project> {
 		pom.issueManagement(this::customizeIssueManagement);
 
 		// TODO: find something better not to add dependencyManagement in pom
-		//       which result spring-security-kerberos-management in it. spring-security-kerberos-dependencies
+		//       which result spring-security-kerberos-management in it. spring-security-kerberos-bom
 		//       has its own dependencyManagement which we need to keep
-		if (!project.getName().equals("spring-security-kerberos-dependencies")) {
+		if (!project.getName().equals("spring-security-kerberos-bom")) {
 			pom.withXml(xxx -> {
 				Node pomNode = xxx.asNode();
 				List<?> childs = pomNode.children();

settings.gradle

@@ -26,6 +26,7 @@ pluginManagement {
 rootProject.name = 'spring-security-kerberos'
 
 include 'spring-security-kerberos-management'
+include 'spring-security-kerberos-bom'
 include 'spring-security-kerberos-core'
 include 'spring-security-kerberos-client'
 include 'spring-security-kerberos-web'

spring-security-kerberos-bom/spring-security-kerberos-bom.gradle

@@ -0,0 +1,5 @@
+plugins {
+	id 'org.springframework.security.kerberos.bom'
+}
+
+description = 'Spring Security Kerberos BOM'