feat(security): add cookie-auth support

Created by: matteomazza91

PR checklist

• Read the contribution guidelines.
• Ran the shell script under ./bin/ to update Petstore sample so that CIs can verify the change. (For instance, only need to run ./bin/{LANG}-petstore.sh and ./bin/security/{LANG}-petstore.sh if updating the {LANG} (e.g. php, ruby, python, etc) code generator or {LANG} client's mustache templates). Windows batch files can be found in .\bin\windows\.
• Filed the PR against the correct branch: Default: master.
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Description of the PR

It adds cookie-auth support as specified in the spec

It relates to issue #208 (closed)

Test performed

run the codegen with -DdebugOperations=true on an OpenAPI spec file with cookie auth.

input:

...
securitySchemes:
  user_creator:
    type: apiKey
    in: cookie
    name: JSESSIONID
....

output:

...
"authMethods" : [ {
    "name" : "user_creator",
    "type" : "apiKey",
    "hasMore" : false,
    "isBasic" : false,
    "isOAuth" : false,
    "isApiKey" : true,
    "vendorExtensions" : { },
    "keyParamName" : "JSESSIONID",
    "isKeyInQuery" : false,
    "isKeyInHeader" : false,
    "isKeyInCookie" : true,
    "isCode" : false,
    "isPassword" : false,
    "isApplication" : false,
    "isImplicit" : false
  } ]
....