Issue #3362678: \Drupal calls should be avoided in classes, use dependency injection instead

added 54 commits

• a032e37b...6660aef9 - 53 commits from branch project:2.0.x
• 797d2943 - Merge remote-tracking branch 'origin/2.0.x' into 3362678-drupal-calls-should

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added 1 commit

• f00f78d3 - removed redudant imports

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