Allow empty host

[rmpestano]

Using empty host in swagger backend ( "host":"") helps when using Swagger UI because it automatically resolves the host URL (via window.location) and it makes it easier to use swagger across multiple hosts/environments

[rmpestano]

Also, to make it working on multiple hosts without bothering with deployedDomain I had to change swagger backend to append application root here: https://github.com/sdaschner/jaxrs-analyzer/blob/master/src/main/java/com/sebastian_daschner/jaxrs_analyzer/backend/swagger/SwaggerBackend.java#L100

Changed to:

.add("host", options.getDomain())
.add("basePath", '/'+projectName+"/" + resources.getBasePath())

It is needed because host is empty so swaggerUI will resolve it based on url and append basePath to make requests.

Here is my swagger.json:

    "swagger":"2.0",
    "info":{
        "version":"1.0.0-SNAPSHOT",
        "title":"apm-arq4"
    },
    "host":"",
    "basePath":"/apm-arq4/rest",
    "schemes":[
        "http",
        "https"
    ],
    "tags":[
        "files",
        "gci",
        "turmas"
    ],
    "paths":{
        "/files":{
            "get":{
                "consumes":[
                ],
...
...

In my opinion this is the simplest way to handle multiple hosts in swaggerUI.

WDYT?

[rmpestano]

closing as it duplicates #42