Fix MNG-7819 IT (#339)

The goal of IT is to "excecise file locking with snapshots"
and not to test model validation.

The IT used dependency had an invalid parent POM w/
wrong packaging and artifactId.
diff --git a/core-it-suite/src/test/resources/mng-7819-file-locking-with-snapshots/repo/org/apache/maven/its/mng7819/parent/1.0.0-SNAPSHOT/parent-1.0.0-20221014.203717-12.pom b/core-it-suite/src/test/resources/mng-7819-file-locking-with-snapshots/repo/org/apache/maven/its/mng7819/parent/1.0.0-SNAPSHOT/parent-1.0.0-20221014.203717-12.pom
index 25fa0db..2b414c7 100644
--- a/core-it-suite/src/test/resources/mng-7819-file-locking-with-snapshots/repo/org/apache/maven/its/mng7819/parent/1.0.0-SNAPSHOT/parent-1.0.0-20221014.203717-12.pom
+++ b/core-it-suite/src/test/resources/mng-7819-file-locking-with-snapshots/repo/org/apache/maven/its/mng7819/parent/1.0.0-SNAPSHOT/parent-1.0.0-20221014.203717-12.pom
@@ -3,6 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
 
     <groupId>org.apache.maven.its.mng7819</groupId>
-    <artifactId>dependency</artifactId>
+    <artifactId>parent</artifactId>
     <version>1.0.0-SNAPSHOT</version>
+    <packaging>pom</packaging>
 </project>