fix the GLY PSSM issue and added a no_ condition to pdb2sql

[NicoRenaud]

I've fixed the GLY issue I think
I've also added a 'no_' condition to pdb2sql but we don't need it in the end.
If the test passes (they should) can you check and merge ?

[coveralls]

Pull Request Test Coverage Report for Build 394

• 17 of 20 (85.0%) changed or added relevant lines in 5 files are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.03%) to 73.518%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
deeprank/tools/pdb2sql.py	4	7	57.14%

Files with Coverage Reduction	New Missed Lines	%
deeprank/features/PSSM_IC.py	1	75.73%
deeprank/features/FullPSSM.py	1	78.9%

Totals
Change from base Build 390:	-0.03%
Covered Lines:	2096
Relevant Lines:	2851

---

💛 - Coveralls

[CunliangGeng]

Test passed and interface GLYs were present for all features, great! So green light for merging the code :-)

[LilySnow]

Thanks. Merge done. I closed the issue.