[TESTS] Rename optimize to forcemerge for internal transport action

Original commit: elastic/x-pack-elasticsearch@4fca4fe3cb

shield/src/test/resources/org/elasticsearch/transport/actions

@@ -28,11 +28,11 @@ indices:admin/delete
 indices:admin/get
 indices:admin/exists
 indices:admin/flush
+indices:admin/forcemerge
 indices:admin/mapping/put
 indices:admin/mappings/fields/get
 indices:admin/mappings/get
 indices:admin/open
-indices:admin/optimize
 indices:admin/refresh
 indices:admin/settings/update
 indices:admin/shards/search_shards
@@ -76,4 +76,4 @@ cluster:admin/plugin/license/get
 cluster:admin/plugin/license/delete
 cluster:admin/plugin/license/put
 cluster:admin/shield/realm/cache/clear
-internal:indices/admin/upgrade
+internal:indices/admin/upgrade

shield/src/test/resources/org/elasticsearch/transport/handlers

@@ -10,11 +10,11 @@ cluster:admin/shield/realm/cache/clear
 cluster:admin/shield/realm/cache/clear[n]
 indices:admin/analyze[s]
 indices:admin/cache/clear[n]
+indices:admin/forcemerge[n]
 indices:admin/flush[s]
 indices:admin/flush[s][r]
 indices:admin/mappings/fields/get[index]
 indices:admin/mappings/fields/get[index][s]
-indices:admin/optimize[n]
 indices:admin/refresh[s]
 indices:admin/refresh[s][r]
 indices:admin/upgrade