Rename methods on Faker::Types to avoid shadowing ruby standard methods

[MarcPer]

In particular, the class method hash, when shadowed, causes an error when Faker::Types is used as a hash key.

The issue is detailed in #1116.

[MarcPer]

The method name changes were as follows:

• Faker::Types.hash => Faker::Types.rb_hash
• Faker::Types.complex_hash => Faker::Types.complex_rb_hash
• Faker::Types.integer => Faker::Types.rb_integer
• Faker::Types.array => Faker::Types.rb_array
• Faker::Types.string => Faker::Types.rb_string

[vbrazo]

Could you please rebase this branch with master, run rubocop and let me know when it's ready for review again? @MarcPer

[coveralls]

Pull Request Test Coverage Report for Build 2133

• 11 of 13 (84.62%) changed or added relevant lines in 1 file are covered.
• 7 unchanged lines in 1 file lost coverage.
• Overall coverage remained the same at 99.64%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
lib/faker/types.rb	11	13	84.62%

Files with Coverage Reduction	New Missed Lines	%
lib/faker/time.rb	7	100.0%

Totals
Change from base Build 2132:	0.0%
Covered Lines:	2214
Relevant Lines:	2222

---

💛 - Coveralls

[MarcPer]

Hey, @vbrazo. It's done.