Support ca_file for http client in curl mode

[strehle]

With curl simulation mode the parameters from curl needs to be passed
The parameters from uaac target xxx are not used here.

Therefore, ca cert was missing. -b for --skip-ssl-validation is available

For uaac target --ca-cert there is was no setting.

Added -C or --cacert because these are the parameters from curl

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[strehle]

@beyhan Added you because this issue causes problems so that I would like to release uaac but also dont want break the cross company rules (about review) so that you and @rkoster should judge, can I merge and release ?

[beyhan]

The change looks straight forward to me. Best would be if this could be coordinated in the UAA area itself. My observation is that the cooperation in the UAA area works good.

[strehle]

f. My observation is that the cooperation in the UAA area works good.

Yes sure, the problem is that if there is an escalation then we need to have a new release in a very short time and for this I ask for your approval.

The cross company reviews work, so I asked you not because I dont get a review from VMware colleagues, but because of an SAP internal escalation

[Tallicia]

This looks good.

[Tallicia]

Feel free to go ahead and merge this or indicate if it's ok for us to merge.