refactor currentSpec to work for Jasmine 2

[johnpapa]

Addresses #5632

#5632

[IgorMinar]

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[johnpapa]

Thanks, I just signed the CLA.

[IgorMinar]

CLA signature verified! Thank you!

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[johnpapa]

Thanks. Looking forward to this as without it, Jasmine 2.0 tests dont work with Angular.

PS - Karma no longer works either :(

[IgorMinar]

merged. thanks John!

[IgorMinar]

karma needs to be fixed separately. I see that there is a PR from @r-park waiting for @vojtajina's review.

[johnpapa]

Agreed on karma. Separate issue too.

Thanks for the Jasmine/ngMocks compat fix!