library/roles/quickrank: Force the git pull by default

quickrank/defaults/main.yml

@@ -2,6 +2,7 @@
 quickrank_install: False
 
 quickrank_git_url: 'https://github.com/hpclab/quickrank'
+quickrank_git_force_pull: True
 quickrank_package_list:
   - gcc-5
   - g++-5

quickrank/tasks/main.yml

@@ -15,7 +15,7 @@
 
 - block:
     - name: Download the quickrank distribution
-      git: repo={{ quickrank_git_url }} dest=/home/{{ d4science_user }}/quickrank
+      git: repo={{ quickrank_git_url }} dest=/home/{{ d4science_user }}/quickrank force={{ quickrank_git_force_pull }}
       register: quickrank_src
 
     - name: Copy some needed files if the distribution is Ubuntu 12.04