Extract autoconfig

- Create separate spring-shell-autoconfigure and keep
  all autoconfig features there.
- Fixes #329

spring-shell-jcommander-adapter/src/main/java/org/springframework/shell/jcommander/JCommanderParameterResolverAutoConfiguration.java

@@ -1,38 +0,0 @@
-/*
- * Copyright 2017 the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.springframework.shell.jcommander;
-
-import com.beust.jcommander.JCommander;
-
-import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
-import org.springframework.context.annotation.Configuration;
-import org.springframework.context.annotation.Bean;
-
-/**
- * Registers JCommanderParameterResolver and supporting beans as appropriate.
- *
- * @author Eric Bottard
- */
-@Configuration
-@ConditionalOnClass(JCommander.class)
-public class JCommanderParameterResolverAutoConfiguration {
-
-	@Bean
-	public JCommanderParameterResolver jCommanderParameterResolver() {
-		return new JCommanderParameterResolver();
-	}
-}

spring-shell-jcommander-adapter/src/main/resources/META-INF/spring.factories

@@ -1,2 +0,0 @@
-org.springframework.boot.autoconfigure.EnableAutoConfiguration=\
-org.springframework.shell.jcommander.JCommanderParameterResolverAutoConfiguration