Removed constraint on namespace when obtaining available Jaeger instances

[jpkrohling]

Fixes #60 by removing the namespace constraint when querying for available Jaegers, as Kubernetes will do the right thing and deliver only the ones that the Operator's account can see.

@gregoryfranklin: do you think you'd be able to try this one out?

Signed-off-by: Juraci Paixão Kröhling juraci@kroehling.de

[jpkrohling]

This change is 

[codecov]

Codecov Report

Merging #213 into master will decrease coverage by 1.52%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #213      +/-   ##
==========================================
- Coverage    96.7%   95.18%   -1.53%     
==========================================
  Files          32       35       +3     
  Lines        1639     1848     +209     
==========================================
+ Hits         1585     1759     +174     
- Misses         41       75      +34     
- Partials       13       14       +1

Impacted Files	Coverage Δ
pkg/inject/sidecar.go	100% <100%> (ø)	⬆️
pkg/strategy/production.go	90.32% <0%> (-9.68%)	⬇️
pkg/strategy/controller.go	100% <0%> (ø)	⬆️
pkg/deployment/collector.go	100% <0%> (ø)	⬆️
pkg/deployment/ingester.go	100% <0%> (ø)	⬆️
pkg/apis/io/v1alpha1/jaeger_types.go	100% <0%> (ø)	⬆️
pkg/deployment/query.go	100% <0%> (ø)	⬆️
pkg/deployment/all-in-one.go	100% <0%> (ø)	⬆️
pkg/account/main.go	100% <0%> (ø)	⬆️
pkg/storage/elasticsearch_role.go	100% <0%> (ø)
... and 4 more

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[jpkrohling]

@pavolloffay could you please review this one?

[pavolloffay]

Docs could point into the example

[jpkrohling]

Done, thanks!