Fix ScullyRoutesService

[mchl18]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/scullyio/scully/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Other... Please describe:

What is the current behavior?

ScullyRoutesService observables looking for property published instead of publish;

Issue Number: #316

What is the new behavior?

Does this PR introduce a breaking change?

• Yes
• No

Other information

[claassistantio]

All committers have signed the CLA.

[SanderElias]

Ok, I looked into it. it is the schematics that are off.
I'm going to ask @jorgeucano to look at this PR, and merge it if he is Ok with it.

[SanderElias]

@mchl18 can you sign the CLA?

[mchl18]

@SanderElias I signed the CLA.