[API] Update specs for http headers

Author: picandocodigo

elasticsearch-api/spec/elasticsearch/api/actions/cat/aliases_spec.rb

@@ -12,7 +12,7 @@
         '_cat/aliases',
         {},
         nil,
-        nil
+        {}
     ]
   end
 

elasticsearch-api/spec/elasticsearch/api/actions/cat/allocation_spec.rb

@@ -12,7 +12,7 @@
         '_cat/allocation',
         {},
         nil,
-        nil
+        {}
     ]
   end
 

elasticsearch-api/spec/elasticsearch/api/actions/cat/count_spec.rb

@@ -12,7 +12,7 @@
         '_cat/count',
         {},
         nil,
-        nil
+        {}
     ]
   end
 

elasticsearch-api/spec/elasticsearch/api/actions/cat/fielddata_spec.rb

@@ -12,7 +12,7 @@
         '_cat/fielddata',
         {},
         nil,
-        nil
+        {}
     ]
   end
 
@@ -28,7 +28,7 @@
           '_cat/fielddata/foo,bar',
           {},
           nil,
-          nil
+          {}
       ]
     end
 

elasticsearch-api/spec/elasticsearch/api/actions/cat/health_spec.rb

@@ -12,7 +12,7 @@
         '_cat/health',
         {},
         nil,
-        nil
+        {}
     ]
   end
 

elasticsearch-api/spec/elasticsearch/api/actions/cat/help_spec.rb

@@ -12,7 +12,7 @@
         '_cat',
         {},
         nil,
-        nil
+        {}
     ]
   end
 

elasticsearch-api/spec/elasticsearch/api/actions/cat/indices_spec.rb

@@ -12,7 +12,7 @@
         '_cat/indices',
         {},
         nil,
-        nil
+        {}
     ]
   end
 

elasticsearch-api/spec/elasticsearch/api/actions/cat/master_spec.rb

@@ -12,7 +12,7 @@
         '_cat/master',
         {},
         nil,
-        nil
+        {}
     ]
   end
 

elasticsearch-api/spec/elasticsearch/api/actions/cat/nodeattrs_spec.rb

@@ -12,7 +12,7 @@
         '_cat/nodeattrs',
         {},
         nil,
-        nil
+        {}
     ]
   end
 

elasticsearch-api/spec/elasticsearch/api/actions/cat/nodes_spec.rb

@@ -12,7 +12,7 @@
         '_cat/nodes',
         {},
         nil,
-        nil
+        {}
     ]
   end