Allow pip extra arguments to be passed to playbooks

This patch adds the variable 'pip_install_options' which is passed to the pip
install module as extra arguments in order to allow the use of options like
'--force-reinstall' when executing playbooks.

eg: openstack-ansible -e pip_install_options="--force-reinstall" \
        setup-openstack.yml

This is required due to constant upstream changes in dependencies which
result in python wheel version upgrades and downgrades between tagged
versions of openstack-ansible.

The intention is that this can be used whenever a deployer switches between
tags for both upgrades and downgrades.

DocImpact
Closes-Bug: #1489251
Closes-Bug: #1499451
Related-Bug: #1501114
Change-Id: I996185e009a4c4af4f23798619bdbd0d490360c9

playbooks/roles/galera_client/tasks/galera_client_install.yml

@@ -40,6 +40,7 @@
   pip:
     name: "{{ item }}"
     state: present
+    extra_args: "{{ pip_install_options|default('') }}"
   register: install_packages
   until: install_packages|success
   retries: 5

playbooks/roles/galera_server/tasks/galera_install.yml

@@ -51,6 +51,7 @@
   pip:
     name: "{{ item }}"
     state: present
+    extra_args: "{{ pip_install_options|default('') }}"
   register: install_packages
   until: install_packages|success
   retries: 5

playbooks/roles/os_ceilometer/tasks/ceilometer_install.yml

@@ -32,6 +32,7 @@
   pip:
     name: "{{ item }}"
     state: present
+    extra_args: "{{ pip_install_options|default('') }}"
   register: install_packages
   until: install_packages|success
   retries: 5

playbooks/roles/os_cinder/tasks/cinder_install.yml

@@ -40,6 +40,7 @@
   pip:
     name: "{{ item }}"
     state: present
+    extra_args: "{{ pip_install_options|default('') }}"
   register: install_packages
   until: install_packages|success
   retries: 5

playbooks/roles/os_glance/tasks/glance_install.yml

@@ -41,6 +41,7 @@
   pip:
     name: "{{ item }}"
     state: present
+    extra_args: "{{ pip_install_options|default('') }}"
   register: install_packages
   until: install_packages|success
   retries: 5

playbooks/roles/os_heat/tasks/heat_install.yml

@@ -40,6 +40,7 @@
   pip:
     name: "{{ item }}"
     state: present
+    extra_args: "{{ pip_install_options|default('') }}"
   register: install_packages
   until: install_packages|success
   retries: 5

playbooks/roles/os_horizon/tasks/horizon_install.yml

@@ -41,6 +41,7 @@
   pip:
     name: "{{ item }}"
     state: present
+    extra_args: "{{ pip_install_options|default('') }}"
   register: install_packages
   until: install_packages|success
   retries: 5

playbooks/roles/os_keystone/tasks/keystone_install.yml

@@ -66,6 +66,7 @@
   pip:
     name: "{{ item }}"
     state: present
+    extra_args: "{{ pip_install_options|default('') }}"
   register: install_packages
   until: install_packages|success
   retries: 5

playbooks/roles/os_neutron/tasks/neutron_install.yml

@@ -52,6 +52,7 @@
   pip:
     name: "{{ item }}"
     state: present
+    extra_args: "{{ pip_install_options|default('') }}"
   register: install_packages
   until: install_packages|success
   retries: 5

playbooks/roles/os_nova/tasks/nova_install.yml

@@ -40,6 +40,7 @@
   pip:
     name: "{{ item }}"
     state: present
+    extra_args: "{{ pip_install_options|default('') }}"
   register: install_packages
   until: install_packages|success
   retries: 5

playbooks/roles/os_swift/tasks/swift_install.yml

@@ -41,6 +41,7 @@
   pip:
     name: "{{ item }}"
     state: present
+    extra_args: "{{ pip_install_options|default('') }}"
   register: install_packages
   until: install_packages|success
   retries: 5

playbooks/roles/os_tempest/tasks/tempest_install.yml

@@ -17,6 +17,7 @@
   pip:
     name: "{{ item }}"
     state: present
+    extra_args: "{{ pip_install_options|default('') }}"
   register: install_packages
   until: install_packages|success
   retries: 5

playbooks/roles/py_from_git/tasks/main.yml

@@ -29,6 +29,7 @@
   pip:
     name: "{{ git_dest }}"
     state: present
+    extra_args: "{{ pip_install_options|default('') }}"
   register: install_packages
   until: install_packages|success
   retries: 5

playbooks/roles/rabbitmq_server/tasks/rabbitmq_install.yml

@@ -49,6 +49,7 @@
   pip:
     name: "{{ item }}"
     state: present
+    extra_args: "{{ pip_install_options|default('') }}"
   register: install_packages
   until: install_packages|success
   retries: 5

playbooks/roles/repo_server/tasks/repo_install.yml

@@ -40,6 +40,7 @@
   pip:
     name: "{{ item }}"
     state: present
+    extra_args: "{{ pip_install_options|default('') }}"
   register: install_packages
   until: install_packages|success
   retries: 5

playbooks/utility-install.yml

@@ -90,6 +90,7 @@
       pip:
         name: "{{ item }}"
         state: present
+        extra_args: "{{ pip_install_options|default('') }}"
       register: install_packages
       until: install_packages|success
       retries: 5