remove guava dependency and add killbill-utils dependency

Author: xsalefter

pom.xml

@@ -79,10 +79,6 @@
             <groupId>com.google.code.findbugs</groupId>
             <artifactId>jsr305</artifactId>
         </dependency>
-        <dependency>
-            <groupId>com.google.guava</groupId>
-            <artifactId>guava</artifactId>
-        </dependency>
         <dependency>
             <groupId>com.typesafe</groupId>
             <artifactId>config</artifactId>
@@ -240,6 +236,11 @@
             <artifactId>killbill-embeddeddb-postgresql</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.kill-bill.commons</groupId>
+            <artifactId>killbill-utils</artifactId>
+            <scope>provided</scope>
+        </dependency>
         <dependency>
             <groupId>org.kill-bill.testing</groupId>
             <artifactId>testing-mysql-server</artifactId>