replicainstall: better client install exception handling
The exception handling of client install inside replica installation
was rather promiscuous, hungrily eating any possible exception thrown
at it. Scoped down the try-except block and reduced its promiscuity.
This change should improve the future development experience debugging
this part of the code.
Reviewed-By: Tomas Krizek <firstname.lastname@example.org>
Reviewed-By: Jan Cholasta <email@example.com>