Regression in some SSH related tests

[paraita]

Due to recent changes to the JDK 8, our SSH related tests (e.g TestSSHInfrastructureV2) are failing on the following error:

java.security.InvalidKeyException: The security strength of SHA-1 digest algorithm is not sufficient for this key size
	at sun.security.provider.DSA.checkKey(DSA.java:111)
	at sun.security.provider.DSA.engineInitSign(DSA.java:143)
	at java.security.Signature$Delegate.engineInitSign(Signature.java:1177)

As a result, this introduce instability to our CI pipeline.