[ALOY-783] Alloy: config.json environment-specific global values are ignored, always returning the env:development value

{
	"global": {
		"key": "defaultValue",
		"anotherKey": 12345
	},
	"env:development": {
		"environment": "development"
	},
	"env:test": {
		"environment": "test"
	},
	"env:production": {
		"environment": "production"
	},
	"os:ios": {
		"key": "iosValue"
	},
	"os:android": {
		"key": "androidValue"
	},
	"dependencies": {}
}

<Alloy>
    <Window id="win" backgroundColor="white" exitOnClose="true" fullscreen="false" title="ScrollView Demo">
        <View id="view" backgroundColor="#336699">
        	<Label id='label1' top='20'>platform key: </Label>
        	<Label id='label2' top='80'>global key: </Label>
        	<Label id='label3' top='140'>environment: </Label>
        </View>
    </Window>
</Alloy>

// Alloy.Globals.someGlobalObject = { key: 'value' };

$.label1.text =  $.label1.text + ' ' + Alloy.CFG.key;
$.label2.text =  $.label2.text + ' ' + Alloy.CFG.anotherKey;
$.label3.text =  $.label3.text + ' ' + Alloy.CFG.environment;


if ((Alloy.isHandheld) && (OS_IOS)){
	alert('iphone handheld!')
}
else if ((Alloy.isHandheld) && (OS_ANDROID)){
	alert('android handheld')
}
else if ((Alloy.isTablet)&&(OS_IOS)){
	alert('ipad tablet!')
}
else if ((Alloy.isTablet)&&(OS_ANDROID)){
	alert('android tablet')
}
else if (OS_MOBILEWEB){
	alert('mobileweb!')
}
else {
	alert("I don't know!'")
}

$.win.open();