TT#26451 Add a check for /var/cores/

- Rename the file so that it makes more sense with the new checks.
- Improve the directory contents check to be more robust against
  changes in ls output (ideally goss would support this directly
  with the contains directive).

Change-Id: I8bebb929240e3147627a1ec5db246f73f948799e

templates/110_filesys-cores.yaml.tt2

@@ -0,0 +1,15 @@
+file:
+  /var/cores:
+    exists: true
+    mode: "1777"
+    owner: root
+    group: root
+    filetype: directory
+    contains: []
+
+command:
+  "ls /var/cores/":
+    exit-status: 0
+    stdout:
+    - "!/^core\\..+/"
+    stderr: []

templates/110_filesys-no-cores.yaml.tt2

@@ -1,6 +0,0 @@
-command:
-  "ls -la /var/cores/core.*":
-    exit-status: 2
-    stdout: []
-    stderr:
-      - "/ls: cannot access '??/var/cores/core.*'??: No such file or directory/"

templates/goss.yaml.tt2

@@ -1,6 +1,6 @@
 gossfile:
   000_self-test-command.yaml: {}
-  110_filesys-no-cores.yaml: {}
+  110_filesys-cores.yaml: {}
   120_filesys-free-space.yaml: {}
   130_filesys-ngcp.yaml: {}
 [% IF general.ngcp_type != 'spce' -%]