issue for --additional-properties useBeanValidation=false

Description

In the following classes:
io.swagger.codegen.languages.JavaJAXRSCXFCDIServerCodegen#processOpts
io.swagger.codegen.languages.JavaResteasyEapServerCodegen#processOpts
io.swagger.codegen.languages.SpringCodegen#processOpts
io.swagger.codegen.languages.AbstractJavaJAXRSServerCodegen#processOpts

the code 'if (useBeanValidation) {writePropertyBack(USE_BEANVALIDATION, useBeanValidation);} ‘ replace with 'writePropertyBack(USE_BEANVALIDATION, useBeanValidation);'
The reason is that When the condition for ‘--additional-properties useBeanValidation=false’,but
The result of ‘additionalProperties.get(USE_BEANVALIDATION)' is 'false' that is String ,{{#useBeanValidation}}hello world{{/useBeanValidation}} shows the hello world,The real result should not show hello world

Swagger-codegen version

version is 2.4.4

Swagger declaration file content or url

Command line used for generation

Steps to reproduce

Related issues/PRs

Suggest a fix/enhancement

Start in processOpts in JavaJAXRSCXFCDIServerCodegen, JavaResteasyEapServerCodegen, SpringCodegen, and AbstractJavaJAXRSServerCodegen. Trace how --additional-properties useBeanValidation=false is stored and consumed by the Mustache conditional. Done means the generated output does not render the conditional content when the option is false.