Refactor the SSDG Gradle build project to build with the local Spring Build Conventions Gradle Plugins.

Move Gradle build script extensions under the ext { .. } code block inside the buildscript { .. } code block.

Declare the repo.spring.io/plugins-release repository to be used by the Gradle build script.

Configure the nohttp Gradle Plugin.

build.gradle

@@ -1,8 +1,13 @@
 buildscript {
+	ext {
+		snapshotBuild = version.endsWith('SNAPSHOT')
+		releaseBuild = version.endsWith('RELEASE')
+		milestoneBuild = !(releaseBuild || snapshotBuild)
+	}
 	repositories {
 		mavenCentral()
 		gradlePluginPortal()
-		maven { url 'https://repo.spring.io/release' }
+		maven { url 'https://repo.spring.io/plugins-release' }
 		maven {
 			url 'https://repo.spring.io/plugins-snapshot'
 			if (project.hasProperty('artifactoryUsername')) {
@@ -14,7 +19,6 @@ buildscript {
 		}
 	}
 	dependencies {
-		classpath 'io.spring.gradle:spring-build-conventions:0.0.38'
 		classpath "org.springframework.boot:spring-boot-gradle-plugin:$springBootVersion"
 	}
 }
@@ -50,8 +54,8 @@ description = 'Spring Session for Apache Geode'
 //ext['spring-data-bom.version'] = "$springDataBomVersion"
 //ext['spring-session-bom.version'] = "$springSessionBomVersion"
 
-ext.snapshotBuild = version.endsWith('SNAPSHOT')
-ext.releaseBuild = version.endsWith('RELEASE')
-ext.milestoneBuild = !(releaseBuild || snapshotBuild)
-
 ext.MAVEN_POM_EDITOR_GRADLE = "$rootDir/gradle/maven-pom-editor.gradle"
+
+nohttp {
+	source.exclude "buildSrc/build/**"
+}