MFC r271227: MFV r271225:
MFC r271227: MFV r271225:

Iterate through all the children instead of returning error when we hit
the first error.  This makes the error message give more information
rather than just the first device that causes problem.

Illumos issue:
    5118 When verifying or creating a storage pool, error messages only
       show one device

Approved by:	re (gjb)

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase