ENH: Expand CDMS testing

[keflavich]

Following #3094, it is clear that there is a range of untested parameters in the CDMS module that require tests.

TODO includes:

• Regression test for 3094 (check that 100501 can be parsed)
• Systematic check that all molecules can be queried

[keflavich]

The systematic search will begin with something like:

from astroquery.linelists.cdms import CDMS
from astropy import units as u

sptbl = CDMS.get_species_table()

for row in sptbl:
    result = CDMS.query_lines(1*u.GHz, 1*u.THz, molecule=str(row['tag']), parse_name_locally=False)
    print(tag, row['molecule'], len(result))

but either CDMS is down right now or they're blocking the airport IP.

[kmaitreys]

Yeah, I tried something like this but some of my requests got timed out as well. Although I still managed to fetch transitions for most of molecules in the database. While doing that, I encountered one more bug

ValueError: invalid literal for int() with base 10: '1 1 2' for molecule 028528 

Here 028528 is another molecule which has some formatting bug. I will add a fix for this as well soon on my #3094 PR.

EDIT: I am not sure that only these two TAG values were problematic though, so a more exhaustive check will be nice.

[bsipocz]

Yeap, adding just those one or two to #3094 would be enough, and this issue can be addressed in a follow-up PR that does a the exhaustive checks.

[keflavich]

Some notes to self: 028528 = H2NC has a format that simply doesn't resemble others:

<pre>
   H2NC8.3280       0.01    -4.4969 3    0.0091  6 -285282357 1 0 1 2 2 1 3 0 0 0 1 1 1 2
   H2NC9.0770       0.01    -4.8318 3    0.0094  4 -285282357 1 0 1 2 1 1 2 0 0 0 1 1 1 1
   H2NC1.8380       0.01     -5.068 3    0.0004  4 -285282357 1 0 1 2 3 1 2 0 0 0 1 2 1 2
   H2NC4.2190       0.01    -4.0711 3    0.0084  8 -285282357 1 0 1 2 3 1 4 0 0 0 1 2 1 3
   H2NC7.2620       0.01    -4.9743 3    0.0094  4 -285282357 1 0 1 1 1 1 2 0 0 0 1 1 1 1
   H2NC8.2110     0.0039    -5.0637 3    0.0004  2  285282357 1 0 1 2 2 1 1 0 0 0 1 2 1 2
   H2NC9.8310       0.01    -4.8718 3    0.0091  4 -285282357 1 0 1 2 1 1 2 0 0 0 1 1 1 2
   H2NC2.5710       0.01    -4.4705 3    0.0000  4 -285282357 1 0 1 2 3 1 2 0 0 0 1 2 1 1
   H2NC6.5450       0.01    -4.9014 3    0.0004  2 -285282357 1 0 1 2 1 1 1 0 0 0 1 2 1 2
   H2NC8.5020       0.01    -4.4981 3    0.0084  6 -285282357 1 0 1 2 2 1 3 0 0 0 1 2 1 3
   H2NC8.9370       0.01    -4.9016 3    0.0000  2 -285282357 1 0 1 2 2 1 1 0 0 0 1 2 1 1
   H2NC9.4500       0.01    -4.4716 3    0.0004  4 -285282357 1 0 1 2 2 1 2 0 0 0 1 2 1 2
   H2NC0.9470       0.01     -4.199 3    0.0004  6 -285282357 1 0 1 2 3 1 3 0 0 0 1 2 1 2
   H2NC2.3830       0.01    -4.4983 3    0.0091  6 -285282357 1 0 1 1 2 1 3 0 0 0 1 1 1 2
   H2NC7.2550       0.01    -5.0661 3    0.0000  2 -285282357 1 0 1 2 1 1 1 0 0 0 1 2 1 1
   H2NC7.8550       0.01    -4.7682 3    0.0094  4 -285282357 1 0 1 1 2 1 2 0 0 0 1 1 1 1
   H2NC9.9960       0.01    -4.8464 3    0.0084  4 -285282357 1 0 1 2 1 1 2 0 0 0 1 2 1 3
   H2NC0.1780       0.01    -5.0721 3    0.0000  4 -285282357 1 0 1 2 2 1 2 0 0 0 1 2 1 1
   H2NC2.8540       0.01    -4.7046 3    0.0091  2 -285282357 1 0 1 1 1 1 1 0 0 0 1 1 1 2
   H2NC5.3100       0.01    -4.7043 3    0.0094  2 -285282357 1 0 1 1 2 1 1 0 0 0 1 1 1 1
   H2NC8.1550       0.01    -4.5573 3    0.0084  4 -285282357 1 0 1 1 1 1 2 0 0 0 1 2 1 3
   H2NC8.5830       0.01    -4.6054 3    0.0091  4 -285282357 1 0 1 1 2 1 2 0 0 0 1 1 1 2
   H2NC2.5480       0.01    -4.5008 3    0.0084  6 -285282357 1 0 1 1 2 1 3 0 0 0 1 2 1 3
</pre></body></html>

compare to 100501:

<pre>
    1222.5020     0.0001    -7.1791 2    0.0000  3 100501 101 1           0              SiC6
    2445.0039     0.0003    -6.2761 2    0.0408  5 100501 101 2           1              SiC6
    3667.5055     0.0004     -5.748 2    0.1223  7 100501 101 3           2              SiC6
    4890.0068     0.0005    -5.3735 2    0.2447  9 100501 101 4           3              SiC6
    6112.5074     0.0006    -5.0832 2    0.4078 11 100501 101 5           4              SiC6
    7335.0070      0.002    -4.8461 2    0.6117 13-100501 101 6           5              SiC6
...
</pre></body></html>

the order, and the spacing, is completely different. CDMS may be unsupportable if they don't provide some kind of metadata about the table format.... but I'm not willing to remove support, as I use the damned thing.