The inverse checking and returning of is-a-mounted-path makes it
difficult to understand the function. It is easier to follow the code
when the function just returns what it says it does, hence added the
comment for the function too.
Some errors were returned directly, others were converted to gRPC
errors. This has been corrected now too, and the caller converts the
plain error to a gRPC error now.
Signed-off-by: Niels de Vos <ndevos@ibm.com>
7f7988be0d