Delayed translation of ui constants

[mzazrivec]

Changes:

• Modify PostponedTranslation to receive block as an argument. This change is to make sure
  the block given is evaluated at the same moment when we're calling .call() or .translate(),
  not when we're constructing the object.
• Use delayed translations for UI constants. These constants are loaded at application startup and
  therefore need to be translated when the constants are being used.

Not all constants have been addressed, the rest will be addressed in a later PR.

https://bugzilla.redhat.com/show_bug.cgi?id=1340437
https://bugzilla.redhat.com/show_bug.cgi?id=1340426
https://bugzilla.redhat.com/show_bug.cgi?id=1275614
https://bugzilla.redhat.com/show_bug.cgi?id=1233072

[chessbyte]

/cc @h-kataria

[miq-bot]

Checked commits mzazrivec/manageiq@c67cddf~...91be50d with ruby 2.2.4, rubocop 0.37.2, and haml-lint 0.16.1
20 files checked, 5 offenses detected

app/controllers/ops_controller/settings/analysis_profiles.rb

• 🔹 - Line 34, Col 121 - Metrics/LineLength - Line is too long. [141/120]

app/views/chargeback/_cb_assignments.html.haml

• 🔴 Warn - Line 12, Col - - Unused block argument - k. You can omit all the arguments if you don't care about them.
• 🔴 Warn - Line 12, Col - - Unused block argument - v. You can omit all the arguments if you don't care about them.

app/views/miq_policy/_alert_profile_assign.html.haml

• 🔴 Warn - Line 17, Col - - Line is too long. [199/160]

spec/lib/postponed_translation_spec.rb

• 🔴 Warn - Line 12, Col 12 - Lint/BlockAlignment - end at 12, 11 is not aligned with pt = PostponedTranslation.new("Test %{bar}") do at 10, 6.

[martinpovolny]

This should go to Darga, after a detailed review.

[mzazrivec]

@martinpovolny Review please?

[martinpovolny]

Needs to be backported together with #9268