Increases code coverage

[sanketbansal]

Changes proposed in this pull request:

• Added Test cases for different components and services which had very low code coverage.

• Link to live demo: http://pr-130-evalai.surge.sh

[codecov-io]

Codecov Report

Merging #130 into master will increase coverage by 14.65%. The diff coverage is n/a.

@@             Coverage Diff             @@
##           master     #130       +/-   ##
===========================================
+ Coverage   53.38%   68.04%   +14.65%     
===========================================
  Files          55       55               
  Lines        2347     2347               
  Branches      253      253               
===========================================
+ Hits         1253     1597      +344     
+ Misses       1020      640      -380     
- Partials       74      110       +36

Impacted Files	Coverage Δ
src/app/services/global.service.ts	44.5% <0%> (+3.29%)	:arrow_up:
src/app/services/api.service.ts	74.57% <0%> (+3.38%)	:arrow_up:
...nents/utility/selectphase/selectphase.component.ts	74.28% <0%> (+11.42%)	:arrow_up:
src/app/services/endpoints.service.ts	82.25% <0%> (+16.12%)	:arrow_up:
...ponents/publiclists/teamlist/teamlist.component.ts	59.74% <0%> (+24.52%)	:arrow_up:
src/app/services/challenge.service.ts	58.15% <0%> (+26.95%)	:arrow_up:
...lengeleaderboard/challengeleaderboard.component.ts	65.21% <0%> (+30.43%)	:arrow_up:
...lengesubmissions/challengesubmissions.component.ts	71.11% <0%> (+35.55%)	:arrow_up:
...bliclists/challengelist/challengelist.component.ts	78.65% <0%> (+38.2%)	:arrow_up:
src/app/app.component.ts	75.4% <0%> (+39.34%)	:arrow_up:
... and 3 more

Impacted Files	Coverage Δ
src/app/services/global.service.ts	44.5% <0%> (+3.29%)	:arrow_up:
src/app/services/api.service.ts	74.57% <0%> (+3.38%)	:arrow_up:
...nents/utility/selectphase/selectphase.component.ts	74.28% <0%> (+11.42%)	:arrow_up:
src/app/services/endpoints.service.ts	82.25% <0%> (+16.12%)	:arrow_up:
...ponents/publiclists/teamlist/teamlist.component.ts	59.74% <0%> (+24.52%)	:arrow_up:
src/app/services/challenge.service.ts	58.15% <0%> (+26.95%)	:arrow_up:
...lengeleaderboard/challengeleaderboard.component.ts	65.21% <0%> (+30.43%)	:arrow_up:
...lengesubmissions/challengesubmissions.component.ts	71.11% <0%> (+35.55%)	:arrow_up:
...bliclists/challengelist/challengelist.component.ts	78.65% <0%> (+38.2%)	:arrow_up:
src/app/app.component.ts	75.4% <0%> (+39.34%)	:arrow_up:
... and 3 more

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[lunayach]

@sanketbansal Please remove the conflicts from the master. @Shekharrajak @RishabhJain2018 should we merge this or keep it opened for now so that he could add more tests later?