@W-11036662: fix(dependency): To enable controlled conflict resolutio…

…n of direct and transitive dependencies version using kork-bom for upgrading the spring-boot 2.3.x. (spinnaker#87)

Picked from spinnaker@7abbfc0

While upgrading the spring-boot 2.2.x to 2.3.x, encountered issue of uncontrolled conflict resolution of jackson and kotlin dependencies in gate (spinnaker/gate#1505). In order to avoid any such issue with other components for upgrades to spring-boot 2.3.x as well as for any future spring-boot upgrades, we can introduce strict adherence of imported maven kork-bom by replacing platform to enforcedPlatform closure.

build.gradle

@@ -60,7 +60,7 @@ subprojects { project ->
     }
 
     dependencies {
-      implementation(platform("com.salesforce.spinnaker.kork:kork-bom:$korkVersion"))
+      implementation(enforcedPlatform("com.salesforce.spinnaker.kork:kork-bom:$korkVersion"))
       annotationProcessor(platform("com.salesforce.spinnaker.kork:kork-bom:$korkVersion"))
       annotationProcessor("org.springframework.boot:spring-boot-configuration-processor")
       testAnnotationProcessor(platform("com.salesforce.spinnaker.kork:kork-bom:$korkVersion"))