User hard-coded spring-boot.version

Replace the `spring-boot.version` property with a hard-coded value,
rather than relying on the parent version. Allows locally installed
snapshots to be used as the parents of projects with a different version
number.

spring-boot-dependencies/pom.xml

@@ -43,8 +43,8 @@
 		</developer>
 	</developers>
 	<properties>
-		<!-- Spring Boot (replaced during a full build to a real value) -->
-		<spring-boot.version>${project.version}</spring-boot.version>
+		<!-- Spring Boot -->
+		<spring-boot.version>1.1.0.BUILD-SNAPSHOT</spring-boot.version>
 		<!-- Third Party -->
 		<activemq.version>5.9.1</activemq.version>
 		<aspectj.version>1.7.4</aspectj.version>