Provide cluster and usernames from k8 config for login

[mohitsuman]

Fix #671

Cluster View

UserName

The new UI also mentions the current context of from k8 config.

[codecov]

Codecov Report

Merging #903 into master will increase coverage by 0.01%.
The diff coverage is 93.47%.

@@            Coverage Diff             @@
##           master     #903      +/-   ##
==========================================
+ Coverage   91.73%   91.74%   +0.01%     
==========================================
  Files          24       25       +1     
  Lines        1464     1503      +39     
  Branches      238      247       +9     
==========================================
+ Hits         1343     1379      +36     
- Misses        121      124       +3

Impacted Files	Coverage Δ
src/k8s/deployment.ts	12% <ø> (ø)	⬆️
src/openshift/component.ts	98.42% <100%> (ø)	⬆️
src/cli.ts	94.73% <100%> (ø)	⬆️
src/openshift/cluster.ts	98.38% <92%> (-1.62%)	⬇️
src/util/kubeUtils.ts	94.73% <94.73%> (ø)

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[codecov]

Codecov Report

Merging #903 into master will decrease coverage by 10%.
The diff coverage is 16.07%.

@@             Coverage Diff             @@
##           master     #903       +/-   ##
===========================================
- Coverage   91.73%   81.73%   -10.01%     
===========================================
  Files          24       25        +1     
  Lines        1464     1511       +47     
  Branches      238      250       +12     
===========================================
- Hits         1343     1235      -108     
- Misses        121      276      +155

Impacted Files	Coverage Δ
src/k8s/deployment.ts	12% <ø> (ø)	⬆️
src/openshift/component.ts	98.42% <100%> (ø)	⬆️
src/cli.ts	94.73% <100%> (ø)	⬆️
src/util/kubeUtils.ts	17.24% <17.24%> (ø)
src/openshift/cluster.ts	8.19% <8%> (-91.81%)	⬇️
src/openshift/openshiftItem.ts	83.33% <0%> (-16.67%)	⬇️
src/odo.ts	90.04% <0%> (-2%)	⬇️

---

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[mohitsuman]

testPR

[dgolovin]

This change should handle corner cases, like empty ~/.kube/config or no config at all.

[dgolovin]

Please do not mix dependency update with new features and fixes.