Switch to spring-boot-starter-parent for <parent> so we get plugin <goal>s

This ensure that using weblab-common-java as the parent is just like
using spring-boot-starter-parent.

Potentially we could/should align with the Spring artifact that we're
building on.

Author: nealeu

pom.xml

@@ -12,7 +12,7 @@
 
     <parent>
         <groupId>org.springframework.boot</groupId>
-        <artifactId>spring-boot-dependencies</artifactId>
+        <artifactId>spring-boot-starter-parent</artifactId> <!-- for dependencies + plugin config such as git.properties -->
         <version>2.0.0.RELEASE</version>
     </parent>
     <modules>