Bug fixes for namelist reads in LAND IAU and UGWP code

[climbfuji]

Description of Changes:

This PR addresses issue #1182

• by closing the namelist file in lnd_iau_mod_set_control if the land iau section is not found and INTERNAL_FILE_NML is not used,
• and by checking that the file open call in cires_ugwpv0_mod_init is successful; if not, it returns with an appropriate error message and error code following CCPP requirements

Tests Conducted:

Tested in NEPTUNE

Dependencies:

None

Documentation:

n/a

Issue (optional):

Closes #1182

Contributors (optional):

n/a