change the SuppressionFilter file value so our config works with Checkstyle (#8)

Author: ThoSap

src/main/resources/checkstyle.xml

@@ -53,8 +53,7 @@
 
     <!-- https://checkstyle.org/config_filters.html#SuppressionFilter -->
     <module name="SuppressionFilter">
-        <property name="file" value="${org.checkstyle.sun.suppressionfilter.config}"
-                  default="checkstyle-suppressions.xml"/>
+        <property name="file" value="${config_loc}/checkstyle-suppressions.xml" default="checkstyle-suppressions.xml"/>
         <property name="optional" value="true"/>
     </module>