update java 3rd-party libs

pdb-ui/build.gradle

@@ -13,15 +13,15 @@ dependencies {
 	compile project(':performanceDb')
 	compile project(':pdb-plotting')
 	
-	compile('org.springframework.boot:spring-boot-starter-mustache:2.0.5.RELEASE') {
+	compile(lib_spring_boot_mustache) {
 		exclude module: 'spring-boot-starter-logging'
 	}
-	compile("org.springframework.boot:spring-boot-starter-web:2.0.5.RELEASE"){
+	compile(lib_spring_boot_web){
 		exclude module: 'spring-boot-starter-logging'
 	}
-	compile("org.springframework.boot:spring-boot-starter-log4j2:2.0.5.RELEASE")
+	compile(lib_spring_boot_log4j2)
 	
-	testCompile("org.springframework.boot:spring-boot-starter-test:2.0.5.RELEASE"){
+	testCompile(lib_spring_boot_test){
 		exclude module: 'spring-boot-starter-logging'
 	}
 }