Polish samples

Fixes gh-698

samples/httpsession-gemfire-boot/build.gradle

@@ -11,12 +11,7 @@ buildscript {
 apply from: JAVA_GRADLE
 apply plugin: "application"
 apply plugin: 'org.springframework.boot'
-
-tasks.findByPath("artifactoryPublish")?.enabled = false
-
-sonarqube {
-	skipProject = true
-}
+apply from: SAMPLE_GRADLE
 
 dependencies {
 	compile "org.springframework.data:spring-data-gemfire:$springDataGemFireVersion",

samples/httpsession-gemfire-clientserver-xml/build.gradle

@@ -1,12 +1,7 @@
 apply from: JAVA_GRADLE
 apply from: TOMCAT_7_GRADLE
 apply plugin: "application"
-
-tasks.findByPath("artifactoryPublish")?.enabled = false
-
-sonarqube {
-	skipProject = true
-}
+apply from: SAMPLE_GRADLE
 
 dependencies {
 	compile project(':spring-session-data-gemfire'),

samples/httpsession-redis-json/build.gradle

@@ -11,8 +11,7 @@ buildscript {
 apply plugin: 'org.springframework.boot'
 
 apply from: JAVA_GRADLE
-
-//tasks.findByPath("artifactoryPublish")?.enabled = false
+apply from: SAMPLE_GRADLE
 
 group = 'samples'
 ext {