Config for validation.enabled not be applied correctly

[BMartinos]

Current behaviour:
The resource validation is being applied whether the config value is set to 'true' or 'false'

Expected behaviour
Setting the validation.enabled value to 'false' should disable the resource validation

Bug solution
https://github.com/jembi/hearth/blob/master/lib/server.js#L70

hearth/lib/plugins/validator.js

Line 38 in 15fe33c

if (!config.getConf('validation:enabled')) {

The places where this config is being checked needs to be updated to check the string value coming back from the config. At the moment, the conditions are assuming these are Booleans and evaluate to true for both string values ('true' / 'false')