Remove join filter from pip module tasks

Ansible 2.2 now treats the 'name' argument for the pip module
as a list, removing the need for us to implement the join
filter to optimise the install execution.

Change-Id: I5daf0a42537ca659d7c43b0aae4e0596e82398fc

tasks/nova_compute_kvm_install.yml

@@ -48,7 +48,7 @@
 
 - name: Install pip packages
   pip:
-    name: "{{ nova_compute_pip_packages | join(' ') }}"
+    name: "{{ nova_compute_pip_packages }}"
     state: "{{ nova_pip_package_state }}"
     virtualenv: "{{ nova_bin | dirname }}"
     virtualenv_site_packages: "no"

tasks/nova_compute_lxd_install.yml

@@ -15,7 +15,7 @@
 
 - name: Install pip packages (venv)
   pip:
-    name: "{{ nova_compute_lxd_pip_packages | join(' ') }}"
+    name: "{{ nova_compute_lxd_pip_packages }}"
     state: "{{ nova_pip_package_state }}"
     virtualenv: "{{ nova_bin | dirname }}"
     virtualenv_site_packages: "no"

tasks/nova_compute_powervm_install.yml

@@ -70,7 +70,7 @@
 
 - name: Install pip packages
   pip:
-    name: "{{ nova_compute_powervm_pip_packages | join(' ') }}"
+    name: "{{ nova_compute_powervm_pip_packages }}"
     state: "{{ nova_pip_package_state }}"
     virtualenv: "{{ nova_bin | dirname }}"
     virtualenv_site_packages: "no"

tasks/nova_console_novnc_install.yml

@@ -40,7 +40,7 @@
 
 - name: Install pip packages
   pip:
-    name: "{{ nova_novnc_pip_packages | join(' ') }}"
+    name: "{{ nova_novnc_pip_packages }}"
     state: "{{ nova_pip_package_state }}"
     virtualenv: "{{ nova_bin | dirname }}"
     virtualenv_site_packages: "no"

tasks/nova_install.yml

@@ -30,7 +30,7 @@
 
 - name: Install requires pip packages
   pip:
-    name: "{{ nova_requires_pip_packages | join(' ') }}"
+    name: "{{ nova_requires_pip_packages }}"
     state: "{{ nova_pip_package_state }}"
     extra_args: >-
       {{ (pip_install_upper_constraints is defined) | ternary('--constraint ' + pip_install_upper_constraints | default(''),'') }}
@@ -87,7 +87,7 @@
 
 - name: Install pip packages
   pip:
-    name: "{{ nova_pip_packages | join(' ') }}"
+    name: "{{ nova_pip_packages }}"
     state: "{{ nova_pip_package_state }}"
     virtualenv: "{{ nova_bin | dirname }}"
     virtualenv_site_packages: "no"