add attribute foreign key to the measurement model

[coveralls]

Coverage increased (+0.2%) to 52.438% when pulling 0da59b05fceca673ef022e4f7fa82794c7ab041c on measurement-attribute into 2f36d75461369715b0f1a4a3890390f333de86f0 on master.

[codecov-io]

Codecov Report

Merging #223 into master will increase coverage by 0.03%. The diff coverage is 76%.

@@            Coverage Diff             @@
##           master     #223      +/-   ##
==========================================
+ Coverage   45.79%   45.82%   +0.03%     
==========================================
  Files          34       34              
  Lines        1378     1390      +12     
  Branches      160      164       +4     
==========================================
+ Hits          631      637       +6     
- Misses        747      750       +3     
- Partials        0        3       +3

Impacted Files	Coverage Δ
client/js/components/assessment/attribute.js	0% <0%> (ø)	:white_check_mark:
measure_mate/admin.py	100% <100%> (ø)	:white_check_mark:
measure_mate/serializers.py	100% <100%> (ø)	:white_check_mark:
measure_mate/views.py	100% <100%> (ø)	:white_check_mark:
measure_mate/models.py	95.34% <58.33%> (-4.66%)	:x:

---

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 2f36d75...997295e. Read the comment docs.

[coveralls]

Coverage increased (+0.2%) to 52.438% when pulling 44158032f3323bb66168cf8ab45db0034980edba on measurement-attribute into 2f36d75461369715b0f1a4a3890390f333de86f0 on master.

[coveralls]

Coverage increased (+0.2%) to 52.438% when pulling 44158032f3323bb66168cf8ab45db0034980edba on measurement-attribute into 2f36d75461369715b0f1a4a3890390f333de86f0 on master.

[coveralls]

Coverage increased (+0.2%) to 52.438% when pulling 44158032f3323bb66168cf8ab45db0034980edba on measurement-attribute into 2f36d75461369715b0f1a4a3890390f333de86f0 on master.

[coveralls]

Coverage increased (+0.2%) to 52.438% when pulling 4ff5f4226af3cacfaa674a9551100c6f7fe98ac7 on measurement-attribute into 2f36d75461369715b0f1a4a3890390f333de86f0 on master.

[coveralls]

Coverage increased (+0.2%) to 52.438% when pulling 997295e036d50b3505155cdd97dcb100ee126c34 on measurement-attribute into 2f36d75461369715b0f1a4a3890390f333de86f0 on master.

[coveralls]

Coverage increased (+0.2%) to 52.438% when pulling 997295e036d50b3505155cdd97dcb100ee126c34 on measurement-attribute into 2f36d75461369715b0f1a4a3890390f333de86f0 on master.