configure_server_settings loses integer values

[jrafanie]

• Print the value's class before and after setting it (for clarity)
• If STDIN strings are really integers, convert them

Although, we do special handling of "100.megabytes" strings, etc. later
when consuming the settings such as in worker_settings using
to_i_with_method, it makes sense to check for integers here at the point
in which the user provides them so we can store them "correctly".

Note, one could argue we should handle floats or other datatypes but
99.9% of our settings are strings or integers.

http://talk.manageiq.org/t/tune-workers-via-cli/3107/4452dd84

Before the fix

$ ./tools/configure_server_settings.rb -s 1 -p workers/worker_base/queue_worker_base/generic_worker/count -v 3
...
{:dry_run=>false, :serverid=>1, :path=>"workers/worker_base/queue_worker_base/generic_worker/count", :value=>"3", :help=>false, :serverid_given=>true, :path_given=>true, :value_given=>true}
Setting [workers/worker_base/queue_worker_base/generic_worker/count], old value: [2] (Integer), new value: [3](String)
Done

After

$ ./tools/configure_server_settings.rb -s 1 -p workers/worker_base/queue_worker_base/generic_worker/count -v 1
...
{:dry_run=>false, :serverid=>1, :path=>"workers/worker_base/queue_worker_base/generic_worker/count", :value=>"1", :help=>false, :serverid_given=>true, :path_given=>true, :value_given=>true}
Setting [workers/worker_base/queue_worker_base/generic_worker/count], old value: [3](Integer), new value: [1](Integer)
Done

[miq-bot]

Checked commits jrafanie/manageiq@ecbc4af~...452dd84 with ruby 2.3.3, rubocop 0.52.0, haml-lint 0.20.0, and yamllint 1.10.0
1 file checked, 3 offenses detected

tools/configure_server_settings.rb

• ⚠️ - Line 33, Col 59 - Lint/AmbiguousRegexpLiteral - Ambiguous regexp literal. Parenthesize the method arguments if it's surely a regexp literal, or add a whitespace to the right of the / if it should be a division.
• ❗ - Line 33, Col 40 - Style/MethodCallWithArgsParentheses - Use parentheses for method calls with arguments.
• ❗ - Line 33, Col 68 - Layout/SpaceInsideParens - Space inside parentheses detected.

[jrafanie]

Alternative found in #17039

[jrafanie]

Closing since #17039 looks to be going in the right direction to solve this more generically without adding too much code.