Steps to reproduce:

• Add property with '::' to Service (ex. 'a::b::c::d' and 'w::x')
• declare input for both properties (one by one)
• suggested name for 'a::b::c::d' is 'a_b::c::d' (NOK), should be 'a_b_c_d'
• download TOSCA
• Import Service, and see duplicated properties 'a::b::c::d' and 'a_b::c::d' ( )
• another problem: declare more that one input , select 2 properties and click 'Declare Input' - suggestion only for first one, and name of the second input is unchanged

Introduced by https://gerrit.onap.org/r/c/sdc/+/133575

cc: KrupaNagabhushan