startStatement() should not be required in Neo4jItemReader

[hadiyarajesh]

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Bug description In Neo4jItemReaderBuilder, startStatement(String startStatement) is required, but Neo4j itself deprecated the START statement and throw error when used. If not used, application will throw BeanCreationException with message java.lang.IllegalArgumentException: startStatement is required.

Environment Spring Boot: 2.7.0 Kotlin: 1.6.10 Neo4j: 4.4.4

Steps to reproduce

@Bean
    fun postReader(): ItemReader<Post> {
        return Neo4jItemReaderBuilder<Post>()
            .name("postReader")
            .sessionFactory(getSessionFactory())
            .startStatement("")
            .matchStatement("(p:Post)")
            .returnStatement("p")
            .targetType(Post::class.java)
            .pageSize(1000)
            .build()
    }

Expected behavior startStatement() should be optional, not mandatory.