[krbdev.mit.edu #7091] Report profile errors when initializing krb5 context

[Zhanna Tsitkova via RT]

Currently, if the profile library reports an  error during initialization of  krb5 library context, in 
many cases this error is ignored. Potentially, it means that not only a misconfiguration goes 
unnoticed for some time, but also  it may cause a  problem to Kerberos administrator as this 
error could be harder to diagnose at the later stages.