Fix compilation followig removal of commons-httpclient dependency. See BZ1155314: CVE-2012-6153 CVE-2014-3577

(cherry picked from commit d306dd9986c33a40ce0118a1bd96bd0dee55aece)
    Fix compilation followig removal of commons-httpclient dependency. See BZ1155314: CVE-2012-6153 CVE-2014-3577
Bug 1168229 - Overview tab missing for External imports editor
Bug 1170128 - Test Scenario: Version history in Overview is empty
adapted to new UberFire extension's common editor infrastructure
Bug 1103803 - Cannot call method in 'expect' section' of Test Scenario
Merge remote-tracking branch 'upstream/master'