wrapper to execute function w/o exceptions escaping

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
[exceptions] unify exception wrapping in nothrow locations

Do not allow exceptions to escape to a code which does not process
exceptions.

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>
adding missing header

Signed-off-by: Denis Zalevskiy <denis.zalevskiy@jolla.com>