Primary development of inventory plugins, partial compat layer

Initialize some inventory plugin test data files
Implement openstack inventory plugin

This may be removed later:
- port non-JSON line strip method from core

Dupliate effort with AWX mainline devel
- Produce ansible_version related to venv

Refactor some of injector management, moving more
  of this overhead into tasks.py, when it comes to
  managing injector kwargs

Upgrade and move openstack inventory script
  sync up parameters

Add extremely detailed logic to inventory file creation
for ec2, Azure, and gce so that they are closer to a
genuine superset of what the contrib script used to give.

awx/main/management/commands/inventory_import.py

@@ -27,6 +27,7 @@ from awx.main.models.inventory import (
     Host
 )
 from awx.main.utils.mem_inventory import MemInventory, dict_to_mem_data
+from awx.main.utils.ansible import filter_non_json_lines
 
 # other AWX imports
 from awx.main.models.rbac import batch_role_ancestor_rebuilding
@@ -173,15 +174,21 @@ class AnsibleInventoryLoader(object):
             cmd = self.get_proot_args(cmd, env)
 
         proc = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, env=env)
-        stdout, stderr = proc.communicate()
-        stdout = smart_text(stdout)
+        raw_stdout, stderr = proc.communicate()
+        raw_stdout = smart_text(raw_stdout)
         stderr = smart_text(stderr)
 
         if self.tmp_private_dir:
             shutil.rmtree(self.tmp_private_dir, True)
         if proc.returncode != 0:
             raise RuntimeError('%s failed (rc=%d) with stdout:\n%s\nstderr:\n%s' % (
-                self.method, proc.returncode, stdout, stderr))
+                self.method, proc.returncode, raw_stdout, stderr))
+
+        # Openstack inventory plugin gives non-JSON lines
+        # Also, running with higher verbosity gives non-JSON lines
+        stdout = filter_non_json_lines(raw_stdout)
+        if stdout is not raw_stdout:
+            logger.warning('Output had lines stripped to obtain JSON format.')
 
         for line in stderr.splitlines():
             logger.error(line)
@@ -313,6 +320,7 @@ class Command(BaseCommand):
         source = source.replace('rhv.py', 'ovirt4.py')
         source = source.replace('satellite6.py', 'foreman.py')
         source = source.replace('vmware.py', 'vmware_inventory.py')
+        source = source.replace('openstack.py', 'openstack_inventory.py')
         if not os.path.exists(source):
             raise IOError('Source does not exist: %s' % source)
         source = os.path.join(os.getcwd(), os.path.dirname(source),