fix(dependency): Issue with jackson-bom and kotlin-bom version confli…

…ct resolution while upgrading the spring-boot 2.3.x (#1505)

* fix(dependency): Introducing spring dependency management gradle plugin

Spring boot has moved to gradle based dependency management from v2.3.x. This change has brought issue of conflict resolution failure of the Jackson-bom version and kotlin-bom version with gate service when it consumes the maven-bom generated by kork. The issue details are available in given link.
https://docs.google.com/document/d/1Ck4KeoB1ER0aQUTnf3e-x-M3i2Ur0It7YaaxEMiMXls/edit

To resolve this issue while upgrading gate service with spring v2.3.x, we must require the spring dependency management gradle plugin.

* Revert "fix(dependency): Introducing spring dependency management gradle plugin"

This reverts commit b3b2c9e.

* fix(dependency): Issue with jackson-bom and kotlin-bom version conflict resolution while upgrading the spring-boot 2.3.x.

The root cause of this issue is uncontrolled conflict resolution of jackson-bom and kotlin-bom dependency version imported from external maven BOM provided by kork-bom, as per the gradle documentation https://docs.gradle.org/6.9.1/userguide/platforms.html#sub:bom_import, we can use gradle enforcedPlatform closure as part of the implementation to strictly adhere the versions of direct and transitive dependencies imported BOM.

implementation(enforcedPlatform("io.spinnaker.kork:kork-bom:$korkVersion"))

build.gradle

@@ -26,7 +26,7 @@ allprojects {
     }
 
     dependencies {
-      implementation platform("io.spinnaker.kork:kork-bom:$korkVersion")
+      implementation enforcedPlatform("io.spinnaker.kork:kork-bom:$korkVersion")
       annotationProcessor platform("io.spinnaker.kork:kork-bom:$korkVersion")
       annotationProcessor("org.springframework.boot:spring-boot-configuration-processor")
       testAnnotationProcessor platform("io.spinnaker.kork:kork-bom:$korkVersion")