update pregelix pom to let it have a distribution zip after build
diff --git a/pregelix/pregelix-dist/src/main/resources/conf/slaves b/pregelix/pregelix-dist/src/main/resources/conf/slaves
new file mode 100644
index 0000000..2fbb50c
--- /dev/null
+++ b/pregelix/pregelix-dist/src/main/resources/conf/slaves
@@ -0,0 +1 @@
+localhost