fix #2496 add searchlog.log

...ava/org/codelibs/fess/app/service/FavoriteLogService.java

src/main/java/org/codelibs/fess/entity/SearchLogEvent.java

...main/java/org/codelibs/fess/es/log/exentity/ClickLog.java

...n/java/org/codelibs/fess/es/log/exentity/FavoriteLog.java

...ain/java/org/codelibs/fess/es/log/exentity/SearchLog.java

...main/java/org/codelibs/fess/es/log/exentity/UserInfo.java

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

.../java/org/codelibs/fess/mylasta/direction/FessConfig.java

src/main/resources/fess_config.properties

src/main/resources/log4j2.xml