Test: let's do the cleanup for every test (#12805)

Author: kares

qa/integration/specs/cli/keystore_spec.rb

@@ -31,6 +31,10 @@
     @logstash = @fixture.get_service("logstash")
   end
 
+  after do
+    FileUtils.rm_f File.join(@logstash.logstash_home, 'config', 'logstash.keystore')
+  end
+
   context 'create' do
 
     before do
@@ -52,10 +56,6 @@
       FileUtils.cp keystore, File.join(@logstash.logstash_home, 'config')
     end
 
-    after do
-      FileUtils.rm_f File.join(@logstash.logstash_home, 'config', 'logstash.keystore')
-    end
-
     it "works" do
       keystore_list = @logstash.run_cmd(['bin/logstash-keystore', 'list'], true, 'LOGSTASH_KEYSTORE_PASS' => 'PaSSWD')
       expect(keystore_list.stderr_and_stdout).to_not match(/ERROR/)