Set timeouts on uri tasks

uri task has a 30 second timeout by default, and in a greenfield
or new host deploy these tasks are always expected to fail, so the
timeout is expected to be met multiple times.

We should set a small timeout on these tasks to fail quickly.

Change-Id: I6748bbd894585d97cce235e854afbcf9d433d34d

playbooks/common-tasks/set-pip-upstream-url.yml

@@ -21,6 +21,7 @@
   uri:
     url: "{{ pip_upstream_url }}"
     method: "HEAD"
+    timeout: 3
   register: _repo_data_check
   failed_when: false
   when: pip_upstream_url != "https://bootstrap.pypa.io/get-pip.py"

playbooks/common-tasks/set-upper-constraints.yml

@@ -22,6 +22,7 @@
   uri:
     url: "{{ pip_install_upper_constraints }}"
     method: "HEAD"
+    timeout: 3
   register: upper_constraints_check
   failed_when: false
   tags:
@@ -31,6 +32,7 @@
   uri:
     url: "{{ pip_default_index }}"
     method: "HEAD"
+    timeout: 3
   register: pip_default_index_check
   failed_when: false
   tags: