Add option to leave tar.gz logs files and flat log

When publishing logs in usptream we need an option to get
all files from host together both getting only one of them.
Save and upload the whole tar.gz for host together with flattened
logs and configs.

Change-Id: Ib272841a9ddf15d9ccd36a5d42a9dd94bf934f8f

roles/collect-logs/defaults/main.yml

@@ -33,6 +33,7 @@ artcl_collect_list:
   - /tmp/tripleoclient*
 artcl_collect_dir: "{{ lookup('env', 'PWD') }}/collected_files"
 artcl_gzip_only: true
+artcl_tar_gz: false
 
 ## publishing related vars
 artcl_publish: false

roles/collect-logs/tasks/collect.yml

@@ -189,7 +189,7 @@
   shell: >
     chdir=/tmp
     tar czf {{ inventory_hostname }}.tar.gz {{ inventory_hostname }};
-  when: not artcl_gzip_only|bool
+  when: artcl_tar_gz|bool
 
 - name: gzip logs individually and tar them
   shell: >
@@ -204,7 +204,7 @@
     dest: "{{ artcl_collect_dir }}/{{ inventory_hostname }}.tar.gz"
     flat: yes
     validate_checksum: no
-  when: not artcl_gzip_only|bool
+  when: artcl_tar_gz|bool
 
 - name: Fetch log archive (tar)
   fetch: