[InteractiveMaps] Tests for blocked users 

Some tests checked that blocked users cannot create map, and change anything on maps (also embedded map)
is there any specific reason for inconsistency in following methods naming:
verifyErrorExist(), verifyErrorAppear(), verifyErrorIsPresented() ?
two of them are using checkElementOnPage method, two have the same error selector, please consider make it more consistent, maybe unify them and move to shared class or just make names consistent?