Adapt to core change

Change-Id: I29fd9b162086cf9319c11286b3dd8df05684536c
diff --git a/src/main/java/com/ericsson/gerrit/plugins/projectgroupstructure/ProjectCreationValidator.java b/src/main/java/com/ericsson/gerrit/plugins/projectgroupstructure/ProjectCreationValidator.java
index d211bba..b911289 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/projectgroupstructure/ProjectCreationValidator.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/projectgroupstructure/ProjectCreationValidator.java
@@ -45,6 +45,7 @@
 import com.google.inject.Provider;
 import com.google.inject.Singleton;
 
+import org.eclipse.jgit.errors.ConfigInvalidException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -159,7 +160,7 @@
             .apply(TopLevelResource.INSTANCE, new GroupInput());
       }
       return AccountGroup.UUID.parse(groupInfo.id);
-    } catch (RestApiException | OrmException | IOException e ) {
+    } catch (RestApiException | OrmException | IOException | ConfigInvalidException e ) {
       log.error("Failed to create project " + name + ": " + e.getMessage(), e);
       throw new ValidationException(AN_ERROR_OCCURRED_MSG);
     }