[test] fix missing REST specs

Something went wrong with my last commit.

Fixing it here.

plugins/pom.xml

@@ -278,13 +278,14 @@
                     <include>api/cluster.state.json</include>
                     <!-- used in plugin REST tests -->
                     <include>api/index.json</include>
+                    <include>api/get.json</include>
+                    <include>api/update.json</include>
                     <include>api/search.json</include>
                     <include>api/indices.analyze.json</include>
                     <include>api/indices.create.json</include>
                     <include>api/indices.refresh.json</include>
                     <include>api/nodes.info.json</include>
                     <include>api/count.json</include>
-                    <include>api/search.json</include>
                 </includes>
             </testResource>
             <!-- shared test resources like log4j.properties -->