Adding missing quotes

[lvarin]

This fixes the problem that was causing a 500/HTTP error.

The JSON produced was invalid due to a lack of quotes.

[codecov[bot]]

Codecov Report

Merging #41 (36ddb93) into master (27a1323) will decrease coverage by 0.32%. The diff coverage is 41.66%.

:exclamation: Current head 36ddb93 differs from pull request most recent head 4b9c716. Consider uploading reports for the commit 4b9c716 to get more accurate results

@@            Coverage Diff             @@
##           master      #41      +/-   ##
==========================================
- Coverage   55.52%   55.19%   -0.33%     
==========================================
  Files          64       64              
  Lines        2064     2089      +25     
  Branches      217      223       +6     
==========================================
+ Hits         1146     1153       +7     
- Misses        787      803      +16     
- Partials      131      133       +2     

Impacted Files	Coverage Δ
...ain/java/uk/ac/ebi/tsc/tesk/config/GsonConfig.java	100.00% <ø> (ø)
...sc/tesk/config/swagger/OAuth2ClientProperties.java	88.88% <ø> (ø)
...bi/tsc/tesk/k8s/config/KubernetesClientConfig.java	92.85% <ø> (ø)
.../uk/ac/ebi/tsc/tesk/k8s/constant/K8sConstants.java	85.71% <ø> (ø)
...i/tsc/tesk/k8s/convert/ExecutorCommandWrapper.java	100.00% <ø> (ø)
...sc/tesk/k8s/convert/KubernetesObjectsSupplier.java	96.61% <ø> (ø)
.../tsc/tesk/k8s/convert/TaskmasterEnvProperties.java	91.66% <ø> (ø)
.../java/uk/ac/ebi/tsc/tesk/k8s/convert/data/Job.java	88.88% <ø> (ø)
.../tsc/tesk/k8s/convert/data/SingleTaskStrategy.java	90.90% <ø> (ø)
...java/uk/ac/ebi/tsc/tesk/k8s/convert/data/Task.java	93.54% <ø> (ø)
... and 6 more

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[sgalpha01]

Yes, it is working fine now.