Store service data in lowercase in rules collection

[fgalan]

According to documentation (https://thinking-cities.readthedocs.io/en/latest/multitenancy/index.html) with regards to service

If uppercase characters are used, they are converted to lowercase.

Thus, the following code should be adapted:

perseo-fe/lib/models/rulesStore.js

Lines 168 to 177 in 1f3c70c

	Save: function Save(r, callback) {
	var db = appContext.Db();
	stringifyPostAxnParams(r);
	async.waterfall(
	[
	db.collection.bind(db, rulesCollectionName, { strict: true }),
	function(col, cb) {
	col.save(r, cb);
	}
	],

And maybe also this one:

perseo-fe/lib/models/rulesStore.js

Lines 185 to 209 in 1f3c70c

	Update: function Update(id, r, callback) {
	var db = appContext.Db();
	stringifyPostAxnParams(r);
	async.waterfall(
	[
	db.collection.bind(db, rulesCollectionName, { strict: true }),
	function(col, cb) {
	col.findOneAndUpdate(
	{ name: id },
	{ $set: r },
	{
	upsert: false,
	returnOriginal: false
	},
	function(err, result) {
	if (result && result.lastErrorObject && result.lastErrorObject.updatedExisting === false) {
	return cb(new errors.NotFoundRule(id), null);
	}
	parsePostAxnParams(r);
	logger.debug('rulesStore.findOneAndUpdate %s', myutils.firstChars(r));
	return cb(err, r);
	}
	);
	}
	],

This is not a big issue as the interaction with CB are already using service in lowercase correctly (see #146 (comment)) but it is needed to avoid that for instance GET /rules - fiware-service: SSS and GET /rules - fiware-service: sss result in different set of rules.