Change default configure action to store-creds, use intuitive names for install and remove

[JohnStarich]

Also adds validation for required fields, like region and resourcegroup to fix #72

[codecov]

Codecov Report

Merging #183 into master will increase coverage by 1.76%.
The diff coverage is 43.23%.

@@            Coverage Diff             @@
##           master     #183      +/-   ##
==========================================
+ Coverage   41.46%   43.23%   +1.76%     
==========================================
  Files          13        5       -8     
  Lines        1423      879     -544     
==========================================
- Hits          590      380     -210     
+ Misses        714      410     -304     
+ Partials      119       89      -30     

Impacted Files	Coverage Δ
controllers/configmap.go	0.00% <0.00%> (ø)
controllers/secret.go	17.85% <17.85%> (ø)
controllers/binding_controller.go	36.47% <36.47%> (ø)
controllers/service_controller.go	50.71% <50.71%> (ø)
controllers/token_controller.go	74.13% <74.13%> (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 d3cedbb...4fe5992. Read the comment docs.

[vazirim]

LGTM