-4 to workaround ipv6 error, add master as aai branch

tasks/configure.yml

@@ -46,6 +46,8 @@
   git:
     repo: "{{ clarin_dspace_aai_git_repo | default ('git@git.app.uib.no:clarino/aai.git') }}"
     dest: "/var/www/html/aai"
+    version: "master"
+    ssh_opts: "-4"
 
 - name: "create symbolic link from python2 to python (python scripts in makefile uses python)"
   file: