tools/importer-rest-api-specs: the URI Suffix is overnormalized.

[tombuildsstuff]

When parsing an Operation containing a URI Suffix containing a - this gets removed unintentionally.

This affects both URIs containing only static segments e.g.

/json-request

And URI Suffixes which are located after a Resource ID, e.g.

`/computers/{computerName}/json-request

In both cases the URI Suffix is output as /jsonrequest rather than /json-request.

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This shouldn't be an issue within ARM since URIs are camelCased but will/may be an issue in Data Plane APIs