Direct passing of AWS login to S3Store

[jmmshn]

Now allows AWS information to be giving as the s3_profile (should consider renaming the parameter to s3_login).

[codecov]

Codecov Report

Merging #326 (a6fdb57) into master (94877f1) will decrease coverage by 1.11%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #326      +/-   ##
==========================================
- Coverage   88.02%   86.91%   -1.12%     
==========================================
  Files          28       28              
  Lines        2130     2170      +40     
==========================================
+ Hits         1875     1886      +11     
- Misses        255      284      +29     

Impacted Files	Coverage Δ
src/maggma/stores/aws.py	85.05% <100.00%> (+0.44%)	⬆️
src/maggma/stores/mongolike.py	76.98% <0.00%> (-10.27%)	⬇️
src/maggma/api/query_operator.py	83.50% <0.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 94877f1...a6fdb57. Read the comment docs.

[shyamd]

Looks good!