Use templar all the way down

Fixes bugs related to creating Templar() objects on the fly, where
the shared loader objects (serialized to TaskExecutor) aren't used
so information loaded into plugin loaders after forking is lost.

Fixes #11815

lib/ansible/plugins/lookup/sequence.py

@@ -22,7 +22,6 @@ from re import compile as re_compile, IGNORECASE
 from ansible.errors import *
 from ansible.parsing.splitter import parse_kv
 from ansible.plugins.lookup import LookupBase
-from ansible.template import Templar
 
 # shortcut format
 NUM = "(0?x?[0-9a-f]+)"
@@ -188,13 +187,11 @@ class LookupModule(LookupBase):
         if isinstance(terms, basestring):
             terms = [ terms ]
 
-        templar = Templar(loader=self._loader, variables=variables)
-
         for term in terms:
             try:
                 self.reset()  # clear out things for this iteration
 
-                term = templar.template(term)
+                term = self._templar.template(term)
                 try:
                     if not self.parse_simple_args(term):
                         self.parse_kv_args(parse_kv(term))