Update Boot version in gradle samples

spring-boot-samples/spring-boot-sample-actuator/build.gradle

@@ -1,6 +1,6 @@
 buildscript {
 	ext {
-		springBootVersion = '1.0.0.BUILD-SNAPSHOT'
+		springBootVersion = '1.1.0.BUILD-SNAPSHOT'
 	}
 	repositories {
 		// NOTE: You should declare only repositories that you need here

spring-boot-samples/spring-boot-sample-simple/build.gradle

@@ -1,6 +1,6 @@
 buildscript {
 	ext {
-		springBootVersion = '1.0.0.BUILD-SNAPSHOT'
+		springBootVersion = '1.1.0.BUILD-SNAPSHOT'
 	}
 	repositories {
 		// NOTE: You should declare only repositories that you need here

spring-boot-samples/spring-boot-sample-web-static/build.gradle

@@ -1,6 +1,6 @@
 buildscript {
 	ext {
-		springBootVersion = '1.0.0.BUILD-SNAPSHOT'
+		springBootVersion = '1.1.0.BUILD-SNAPSHOT'
 	}
 	repositories {
 		// NOTE: You should declare only repositories that you need here

spring-boot-samples/spring-boot-sample-web-ui/build.gradle

@@ -1,7 +1,7 @@
 buildscript {
 	ext {
-		springBootVersion = '1.0.0.BUILD-SNAPSHOT'
-		springLoadedVersion = '1.1.5.RELEASE'
+		springBootVersion = '1.1.0.BUILD-SNAPSHOT'
+		springLoadedVersion = '1.2.0.RELEASE'
 	}
 	repositories {
 		// NOTE: You should declare only repositories that you need here