fix #2561 add scripnt engine

pom.xml

src/main/java/org/codelibs/fess/Constants.java

...rg/codelibs/fess/crawler/transformer/FessTransformer.java

src/main/java/org/codelibs/fess/ds/AbstractDataStore.java

...va/org/codelibs/fess/exception/ScriptEngineException.java

...main/java/org/codelibs/fess/helper/PathMappingHelper.java

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

src/main/java/org/codelibs/fess/indexer/DocBoostMatcher.java

src/main/java/org/codelibs/fess/job/impl/GroovyExecutor.java

...n/java/org/codelibs/fess/script/AbstractScriptEngine.java

src/main/java/org/codelibs/fess/script/ScriptEngine.java

...in/java/org/codelibs/fess/script/ScriptEngineFactory.java

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

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

src/main/resources/fess.xml

src/main/resources/fess_se.xml

...test/java/org/codelibs/fess/ds/AbstractDataStoreTest.java

...t/java/org/codelibs/fess/indexer/DocBoostMatcherTest.java