Improve the logic of CommandRouteParser for separators

[perpetualintelligencegit]

Describe the bug
These tests should fail:
Value_Separators_In_Between_Are_Ignored
Duplicate_Value_Separators_In_Between_Are_Ignored
Mixed_Duplicate_Value_Separators_In_Between_Are_Ignored

Our current logic uses separator and valueSeparation to split the command string. This is not an issue if both are the same e.g. " ".

If both values are different (e..g " " and "=") then this has an unexpected consequence. We end up ignoring an invalid command string. root1=grp1=cmd1 --opt3=\"option delimited value3\"

This should be an error as the command and arguments are still required to be separated by " ".