CB-6326 (cordova-blackberry) target-utils.js

https://issues.apache.org/jira/browse/CB-6326

target-utils.js file has been updated,
simulator replaced by emulator.
CB-6326 Fix inconsistency between manually added vs auto-detected emulators

Manually added targets had type of 'simulator' in blackberry10.json where
those automatically added by the run script use 'emulator'. This change makes
'emulator' the default everywhere including updating older files.