HYD-2448: More installer hardening
HYD-2448: More installer hardening

Try harder to never display raw exceptions to users. Check more
assumptions.

Change-Id: I67fb1df621170fc897dbffb1b8a54cd6fc749ed8

intel-hpdd/intel-manager-for-lustre,intel-hpdd/intel-manager-for-lustre,intel-hpdd/intel-manager-for-lustre