Remove undef values from the tags array

[dsolsona]

Two minor fixes:

raise Exception("") doesn't seem to work in ruby 1.9 or 2.x but raise Exception.new('') does

irb(main):003:0> raise Exception("Unable to handle object of type <%s>" % obj.class.to_s)
NoMethodError: undefined method `Exception' for main:Object
    from (irb):3

irb(main):004:0> raise Exception.new("Unable to handle object of type <%s>" % obj.class.to_s)
Exception: Unable to handle object of type <String>
    from (irb):4

The second fix happens when you pass an undef inside the $tags variable. This causes consul_sorted_json to throw an exception. delete_undef_values doesn't seem to be able to remove the undef from the tags array inside the $basic_hash hash.

Explicitly running delete_undef_values on the tags fixes the issue.

[hopperd]

Could we get a test added for this case?

[mcasper]

@dsolsona For your second problem, what you're actually running into are nested :undef values, the function currently only takes care of top level :undefs. See #263

[solarkennedy]

Closing. Thanks again @mcasper.