add domain_suffix option to internet .email and .domain_name

[ngouy]

Issue#

#1845

Description:

Clean and Fix the Internet.domain_name and Internet.email api as seen with @tiagofsilva

[Zeragamba]

I find domain_suffix to be a bit confusing and verbose to me. What about just tld?

[ngouy]

I have to confess that I had to google it to find out that tld the abbreviation for top-level-domain (boooo what a shame ^^, not sure you should accept a PR from this guy).
In general, I feel like using abbreviations can sometimes be inconvenient for others not as comfortable as us about some domains.

Though I agree that domain_suffix is verbose (and can easily be confusing too)

[Zeragamba]

Testing locally, I noticed that the root issue (periods being stripped from the domain name) was resolved at some point:

irb(main):002:0> require 'faker'
=> true
irb(main):003:0> Faker::VERSION
=> "2.10.1"
irb(main):004:0> Faker::Internet.email(domain: "example.gov.uk")
=> "fredrick@example.gov.uk"

I don't think this PR is needed anymore.

[ngouy]

I close this for now until @tiagofsilva want to discuss about it sometimes