fix #1559 add CurlHelper

src/main/java/org/codelibs/fess/api/es/EsApiManager.java

...codelibs/fess/app/web/admin/backup/AdminBackupAction.java

...g/codelibs/fess/app/web/admin/esreq/AdminEsreqAction.java

...s/fess/app/web/api/admin/backup/ApiAdminBackupAction.java

src/main/java/org/codelibs/fess/dict/DictionaryManager.java

src/main/java/org/codelibs/fess/es/client/FessEsClient.java

src/main/java/org/codelibs/fess/helper/CurlHelper.java

src/main/java/org/codelibs/fess/util/ComponentUtil.java

src/main/java/org/codelibs/fess/util/UpgradeUtil.java

src/main/resources/fess.xml