Adapt RestAPI apply() method to Gerrit master

Gerrit master requires that the RestAPI apply() method
returns a typed response instead of a generic Java Object.

Change-Id: Ief1472f955a49ec5d3e7c14c6698ac6e17c92aca

src/main/java/com/googlesource/gerrit/plugins/healthcheck/api/HealthCheckStatusEndpoint.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/healthcheck/api/HealthCheckStatusEndpoint.java b/src/main/java/com/googlesource/gerrit/plugins/healthcheck/api/HealthCheckStatusEndpoint.java
index b032c02..ecae202 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/healthcheck/api/HealthCheckStatusEndpoint.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/healthcheck/api/HealthCheckStatusEndpoint.java
@@ -34,7 +34,7 @@
   }
 
   @Override
-  public Object apply(ConfigResource resource)
+  public Response<Map<String, Object>> apply(ConfigResource resource)
       throws AuthException, BadRequestException, ResourceConflictException, Exception {
     long ts = System.currentTimeMillis();
     Map<String, Object> result = healthChecks.run();

src/main/java/com/googlesource/gerrit/plugins/healthcheck/check/QueryChangesHealthCheck.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/healthcheck/check/QueryChangesHealthCheck.java b/src/main/java/com/googlesource/gerrit/plugins/healthcheck/check/QueryChangesHealthCheck.java
index 331ef21..5ccaf9b 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/healthcheck/check/QueryChangesHealthCheck.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/healthcheck/check/QueryChangesHealthCheck.java
@@ -59,7 +59,7 @@
       queryChanges.addQuery(config.getQuery(QUERYCHANGES));
       queryChanges.setStart(0);
 
-      List<?> changes = queryChanges.apply(null);
+      List<?> changes = queryChanges.apply(null).value();
       if (changes == null) {
         log.warn("Cannot query changes: received a null list of results");
         return Result.FAILED;