Fix imports and property name when using anyof/oneof in services

[smasala]

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Description of the PR

Fixes request params when using anyOf / oneOf for api services where the param was gerenated as "UNKNOWN_BASE_TYPE" instead of (in TS) Model1 | Model2.

Currently:

import { Model1 | Model2} from '../model/model1Model2';
import { UNKNOWN_BASE_TYPE } from '../model/uNKNOWNBASETYPE';

...

public updateRequest(id: string, UNKNOWN_BASE_TYPE: UNKNOWN_BASE_TYPE, observe?: 'body', reportProgress?: boolean): Observable<EnvelopeOfModels>;

Fix:

import { Model1 } from '../model/model1';
import { Model2 } from '../model/model2';

...

public updateRequest(id: string, model1Model2: Model1 | Model2, observe?: 'body', reportProgress?: boolean): Observable<EnvelopeOfModels>;

@TiFu (2017/07) @taxpon (2017/07) @sebastianhaas (2017/07) @kenisteward (2017/07) @Vrolijkx (2017/09) @macjohnny (2018/01) @nicokoenig (2018/09) @topce (2018/10)

[macjohnny]

LGTM

[macjohnny]

will it always be surrounded by spaces, i.e. |?

[smasala]

Yes. But I must admit, the whole (any/one) of issue needs to be reconsidered as it's more of a hack rather than a sustainable fix. :|

[macjohnny]

@smasala thanks for your PR!
can you perform a search to find which of the open issues would be closed by this PR?
https://github.com/OpenAPITools/openapi-generator/issues?utf8=%E2%9C%93&q=is%3Aissue+is%3Aopen+UNKNOWN_BASE_TYPE

[smasala]

@macjohnny don't think it fixes any of them

[smasala]

@macjohnny don't think the travis fail is due to this commit

[macjohnny]

@smasala I restarted CI

[macjohnny]

@smasala somehow the travis build keeps failing. could you please merge the most recent master?

[wing328]

FYI @OpenAPITools/generator-core-team

[wing328]

@smasala thanks for the PR, which has been included in the v4.1.1 release: https://twitter.com/oas_generator/status/1165944867391860737