Use more robust logstreamer file match

Change-Id: Idf88c5877cb40a74caed439e87cb2b02bde9bbfd
diff --git a/heat/meta/heka.yml b/heat/meta/heka.yml
index 592ce2d..78e1149 100644
--- a/heat/meta/heka.yml
+++ b/heat/meta/heka.yml
@@ -11,8 +11,8 @@
   input:
     heat_log:
       engine: logstreamer
-      log_directory: "/var/log/heat"
-      file_match: '(?P<Service>.+)\.log\.?(?P<Seq>\d*)$'
+      log_directory: "/var/log"
+      file_match: 'heat/(?P<Service>.+)\.log\.?(?P<Seq>\d*)$'
       differentiator: ['heat', '_', 'Service']
       priority: ["^Seq"]
       decoder: "heat_decoder"