Add test for KRA with ECC #4589

Job	Run time
Building ACME images	4m 46s
Publishing ACME images	0s
ACME with postgresql back-end / Test	5m 47s
ACME server switchover / Test	4m 16s
ACME with certbot / Test	4m 13s
ACME container / Test	1m 17s
	20m 19s

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