Upgrade the Spring Boot-based samples to 2.1.9.RELEASE

See gh-656

Author: izeye

samples/junit5/build.gradle

@@ -3,7 +3,7 @@ buildscript {
 		mavenCentral()
 	}
 	dependencies {
-		classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.1.8.RELEASE'
+		classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.1.9.RELEASE'
 	}
 }
 

samples/rest-assured/build.gradle

@@ -3,7 +3,7 @@ buildscript {
 		mavenCentral()
 	}
 	dependencies {
-		classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.1.8.RELEASE'
+		classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.1.9.RELEASE'
 	}
 }
 

samples/rest-notes-spring-data-rest/pom.xml

@@ -11,7 +11,7 @@
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
-		<version>2.1.8.RELEASE</version>
+		<version>2.1.9.RELEASE</version>
 		<relativePath />
 	</parent>
 

samples/rest-notes-spring-hateoas/build.gradle

@@ -3,7 +3,7 @@ buildscript {
 		mavenCentral()
 	}
 	dependencies {
-		classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.1.8.RELEASE'
+		classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.1.9.RELEASE'
 	}
 }
 

samples/testng/build.gradle

@@ -3,7 +3,7 @@ buildscript {
 		mavenCentral()
 	}
 	dependencies {
-		classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.1.8.RELEASE'
+		classpath 'org.springframework.boot:spring-boot-gradle-plugin:2.1.9.RELEASE'
 	}
 }