Rename fetch-translations-stestr-output

The role name is misleading. It's not fetching stestr output, it's
fetching subunit output.

Add a note to the README explaining what it does and that it's not using
fetch-subunit-output on purpose.

Use  "{{ zuul.project.src_dir }}" instead of
"src/{{ zuul.project.canonical_name }}".

Change-Id: I1b5ab65f9697ec184969ca7899fb40294cdb853c

playbooks/translation/propose-translation-update.yaml

@@ -8,8 +8,8 @@
     - name: Run propose_translation_update.sh script
       command: "{{ ansible_user_dir }}/scripts/propose_translation_update.sh {{ zuul.project.short_name }} {{ zuul.branch }} {{ zuul.job }}"
       args:
-        chdir: "src/{{ zuul.project.canonical_name }}"
+        chdir: "{{ zuul.project.src_dir }}"
 
 - hosts: all
   roles:
-    - fetch-translations-stestr-output
+    - fetch-translations-subunit-output

playbooks/translation/upstream-translation-update.yaml

@@ -8,9 +8,9 @@
     - name: Run upstream_translation_update.sh script
       command: "{{ ansible_user_dir }}/scripts/upstream_translation_update.sh {{ zuul.project.short_name }} {{ zuul.job }} {{zuul.branch}}"
       args:
-        chdir: "src/{{ zuul.project.canonical_name }}"
+        chdir: "{{ zuul.project.src_dir }}"
 
 - hosts: all
   roles:
     - fetch-translation-output
-    - fetch-translations-stestr-output
+    - fetch-translations-subunit-output

roles/fetch-translations-stestr-output/README.rst

@@ -1,12 +0,0 @@
-Collect stestr output from translation jobs
-
-This role collects only the testrepository.subunit file which has to
-be compressed already.
-
-**Role Variables**
-
-.. zuul:rolevar:: zuul_work_dir
-   :default: {{ zuul.project.src_dir }}
-
-   Directory where ``testrepository.subunit.gz`` file is.
-

roles/fetch-translations-stestr-output/defaults/main.yaml

@@ -1,2 +0,0 @@
----
-zuul_work_dir: "src/{{ zuul.project.canonical_name }}"

roles/fetch-translations-subunit-output/README.rst

@@ -0,0 +1,14 @@
+Collect subunit output from translation jobs
+
+This role collects only the testrepository.subunit file which has
+already been compressed. The common_translation_update.sh script
+uses generate-subunit to create a subunit file containing success or
+failure, thus :zuul:role:`fetch-subunit-output` is not appropriate.
+
+**Role Variables**
+
+.. zuul:rolevar:: zuul_work_dir
+   :default: {{ zuul.project.src_dir }}
+
+   Directory where ``testrepository.subunit.gz`` file is.
+

roles/fetch-translations-subunit-output/defaults/main.yaml

@@ -0,0 +1,2 @@
+---
+zuul_work_dir: "{{ zuul.project.src_dir }}"