Change in the MAPSCALE_AGE from integer to double

[kamwal]

In the pcm_owc_config.ini file the MAPSCALE_AGE variable can be only set as the integer value.
It would be good to change it to double.

applying OWC

updating salinity mapper
Traceback (most recent call last):
File "/users/argo/dm_qc/SO_assesment/DMQC-PCM-Python/so_dmqc_master.py", line 244, in
obj.run()
File "/users/argo/dm_qc/SO_assesment/DMQC-PCM-Python/so_dmqc_master.py", line 173, in run
calibration.update_salinity_mapping(str(float_WMO), self.OWC_CONFIG,
File "/users/argo/dm_qc/SO_assesment/DMQC-PCM-Python/argodmqc_owc/pyowc/calibration.py", line 83, in update_salinity_mapping
map_age_large = int(config['MAPSCALE_AGE_LARGE'])
ValueError: invalid literal for int() with base 10: '0.69'