[TEST] Rename remaining yaml tests to yml

Original commit: elastic/x-pack-elasticsearch@5ee8b9ab7b

plugin/src/test/resources/org/elasticsearch/xpack/security/authc/ldap/support/ldapWithGroupSearch.yml

@@ -1,4 +1,3 @@
-# This LDAP connection does group lookup by a subtree search, no role mapping
 ldap:
   urls:
     - ldap://ldap.example.com:1389

plugin/src/test/resources/org/elasticsearch/xpack/security/authc/ldap/support/ldapWithRoleMapping.yml

@@ -1,4 +1,3 @@
-# This LDAP connection does group lookup by attribute with group to role mapping
 ldap:
   urls: # these connections are not round-robin, but primary, secondary, etc.  When the first fails the second is attempted
     - ldap://ldap.example.com:1389

plugin/src/test/resources/rest-api-spec/test/change_password/10_basic.yml

@@ -54,7 +54,6 @@ teardown:
 "Test changing users password":
   - skip:
       features: catch_unauthorized
-# validate that the user actually works
   - do:
       headers:
         Authorization: "Basic am9lOnMza3JpdA=="

plugin/src/test/resources/rest-api-spec/test/ml/index_layout.yml

@@ -154,7 +154,6 @@
                   job_id: index-layout-job2
   - match: {count: 3}
 
-# Put some categorizer state
   - do:
       index:
         index: .ml-state

plugin/src/test/resources/rest-api-spec/test/roles/10_basic.yml

@@ -66,7 +66,6 @@ teardown:
             }
   - match: { role: { created: true } }
 
-# test that the role actually works
   - do:
       headers:
         Authorization: "Basic am9lOnMza3JpdA=="

plugin/src/test/resources/rest-api-spec/test/roles/11_idx_arrays.yml

@@ -53,7 +53,6 @@ teardown:
             }
   - match: { user: { created: true } }
 
-# Index a doc and make sure the "joe" user can see it
   - do:
       index:
         index: foo

plugin/src/test/resources/rest-api-spec/test/users/16_update_user.yml

@@ -37,7 +37,6 @@ teardown:
   - skip:
       features: [headers, catch_unauthorized]
 
-# test that the role actually works
   - do:
       headers:
         Authorization: "Basic am9lOnMza3JpdA=="

plugin/src/test/resources/rest-api-spec/test/users/30_enable_disable.yml

@@ -24,7 +24,6 @@ teardown:
 
 ---
 "Test disable then enable user":
-# check that the user works
   - do:
       headers:
         Authorization: "Basic am9lOnMza3JpdA=="

plugin/src/test/resources/rest-api-spec/test/users/31_create_disabled.yml

@@ -24,7 +24,6 @@ teardown:
 
 ---
 "Test disable then enable user":
-# validate user cannot login
   - do:
       catch: unauthorized
       headers:

plugin/src/test/resources/rest-api-spec/test/watcher/ack_watch/30_reset_ack_after_unmet_condition.yml

@@ -11,7 +11,6 @@ teardown:
         id: "my_watch"
         ignore: 404
 
-# See https://github.com/elastic/x-pack-elasticsearch/issues/1123
 ---
 "Ensure that ack status is reset after unsuccesful execution":
 

plugin/src/test/resources/rest-api-spec/test/xpack/10_basic.yml

@@ -1,5 +1,3 @@
-# Integration tests for monitoring
-#
 "X-Pack loaded":
     - do:
         cluster.state: {}

plugin/src/test/resources/rest-api-spec/test/xpack/15_basic.yml

@@ -1,5 +1,3 @@
-# Integration tests xpack info and usage API
-#
 "X-Pack Info and Usage":
 
   - do: