Documentation: Add info about querychanges

Followup to I3625b6ad54bb9605c9ddb497923da9f161bbffa5
Also, remove trailing whitespace.

Change-Id: I6adf82dbc74b5ea471a67b23e1e8f6c816014c9f
Signed-off-by: Tyler Cipriani <tcipriani@wikimedia.org>

README.md

diff --git a/README.md b/README.md
index fe38bc8..f5af98a 100644
--- a/README.md
+++ b/README.md
@@ -37,16 +37,17 @@
 
 - ts: epoch timestamp in millis of the test
 - elapsed: elapsed time in millis to perform the check
+- querychanges: check that Gerrit can query changes
 - reviewdb: check that Gerrit can connect and query ReviewDb
 - projectslist: check that Gerrit can list projects
-- jgit: check that Gerrit can access repositories 
+- jgit: check that Gerrit can access repositories
 
 Each check returns a JSON payload with the following information:
 
 - ts: epoch timestamp in millis of the individual check
 - elapsed: elapsed time in millis to complete the check
 - result: result of the health check
-  
+
   - passed: the check passed successfully
   - failed: the check failed with an error
   - timeout: the check took too long and timed out
@@ -59,9 +60,15 @@
 200 OK
 Content-Type: application/json
 
+)]}'
 {
   "ts": 139402910202,
   "elapsed": 100,
+  "querychanges": {
+    "ts": 139402910202,
+    "elapsed": 20,
+    "result": "passed"
+  },
   "reviewdb": {
     "ts": 139402910202,
     "elapsed": 50,
@@ -88,9 +95,15 @@
 500 ERROR
 Content-Type: application/json
 
+)]}'
 {
   "ts": 139402910202,
   "elapsed": 100,
+  "querychanges": {
+    "ts": 139402910202,
+    "elapsed": 20,
+    "result": "passed"
+  },
   "reviewdb": {
     "ts": 139402910202,
     "elapsed": 50,
@@ -117,4 +130,4 @@
 Some additional metrics are also produced to give extra insights on their result about results and latency of healthcheck
 sub component, such as jgit, reviewdb, etc.
 
-More information can be found in the [config.md](resources/Documentation/config.md) file.
\ No newline at end of file
+More information can be found in the [config.md](resources/Documentation/config.md) file.

src/main/resources/Documentation/config.md

diff --git a/src/main/resources/Documentation/config.md b/src/main/resources/Documentation/config.md
index 74ad62c..5f448a1 100644
--- a/src/main/resources/Documentation/config.md
+++ b/src/main/resources/Documentation/config.md
@@ -14,6 +14,11 @@
 {
   "ts": 139402910202,
   "elapsed": 100,
+  "querychanges": {
+    "ts": 139402910202,
+    "elapsed": 20,
+    "result": "passed"
+  },
   "reviewdb": {
     "ts": 139402910202,
     "elapsed": 50,
@@ -44,6 +49,7 @@
 
 The following check names are available:
 
+- `querychanges`: check the ability to query changes
 - `reviewdb` : check connectivity and ability to query ReviewDb
 - `jgit` : check connectivity to the filesystem and ability to open a JGit ref and object
 - `projectslist` : check the ability to list projects with their descriptions
@@ -63,4 +69,4 @@
 - `healthcheck.<checkName>.limit` : Maximum number of elements to retrieve from
   the the check results.
 
-  Default: 10
\ No newline at end of file
+  Default: 10