Description of problem:
Smart Class Parameter override default values are changed by the system, causing faulty YAML generation or error when generating YAML.

Double quotes or other formating depending on the parameter type is added to the user input, causing problems if the user goes back to enable overides for other parameters of the class, or simply look at the current overrides and then press 'Submit' without any changes.

Version-Release number of selected component (if applicable):
Satellite 6.1.0 Beta

How reproducible:
Easy, detailed steps below.

Steps to Reproduce:
1. Add puppet plugins to Satellite
(This problem is not specific to these modules, but it is a good example)
https://forge.puppetlabs.com/saz/resolv_conf
https://forge.puppetlabs.com/puppetlabs/stdlib
2. Configure -> Puppet classes -> resolv_conf
3. Select "Smart Class Parameter" tab.
4. Select "nameservers" parameter.
5. Tick the "Overide" box.
6. Set "Parameter Type" == "Array"
7. In "Default value" type in: 

 ['<%= @host.subnet.dns_primary %>', '<%= @host.subnet.dns_secondary %>']

8. Select "searchpath" parameter.
9. Tick the "Overide" box.
10. Set "Parameter Type" == "Array"
11. In "Default value" type in:

 ['<%= @host.domain %>']

12. Add the puppet modules to a content view.
13. Change Puppet Environment on a host to match the content view where the modules are available.
14. Edit the puppet classes of the host to include the 'resolve_conf' class and submit changes.
15. Look at the YAML for the host.
 Example YAML at this stage:

classes:
  resolv_conf:
    nameservers:
    - 192.168.102.254
    - 192.168.101.10
    searchpath:
    - lnx.example.com

16. Configure -> Puppet classes -> resolv_conf
17. Select "Smart Class Parameter" tab.
18. Look at the current settings.
 NOTICE: Double quotes have been added to the previously entered values in "Default Values" fields.

 nameserver value is now:
   "['<%= @host.subnet.dns_primary %>', '<%= @host.subnet.dns_secondary %>']"
 searchpat value is now:
   "['<%= @host.domain %>']"
19. Do not change anything.
20. Press the 'Submit' to "apply" changes button.
21. Go back to your host and look at the YAML, it gives error:

 """ Unable to generate output, Check log files\n """

In production log:
015-07-08 22:02:12 [I] Processing by HostsController#externalNodes as HTML
2015-07-08 22:02:12 [I]   Parameters: {"name"=>"test01.lnx.example.com", "id"=>"test01.lnx.example.com"}
2015-07-08 22:02:12 [W] No SSL cert with CN supplied - request from 192.168.102.1, 
2015-07-08 22:02:14 [W] Failed to generate external nodes for test01.lnx.example.com with undefined local variable or method `logger' for #<Classification::ClassParam:0x0000000e812370>
2015-07-08 22:02:14 [I]   Rendered text template (0.0ms)
2015-07-08 22:02:14 [I] Completed 412 Precondition Failed in 1675ms (Views: 205.3ms | ActiveRecord: 69.7ms)


Actual results:
double quotes and something other escape chars are added to the original input in the "Default Value" field of smart parameters. 

This causes YAML to either fail to render, or change the result.

Expected results:
The values typed in should not be changed, and looking at or changing a different smart parameter value and submitting changes should to cause changes to other smart parameter default value overrides to change and break previously working configuration

Additional info:
Try to play with using yaml format in overrides instead of array as well.

Example:
nameserver default value type as yaml:
- <%= @host.subnet.dns_primary %>
- <%= @host.subnet.dns_secondary %>
searchpath default value type as yaml:
- <%= @host.domain %>

Submit, and YAML result is:

classes:
  resolv_conf:
    nameservers:
    - 192.168.102.254
    - 192.168.101.10
    searchpath:
    - lnx.example.com

Go back and look at Smart Class Parmeters for the puppet class, notice that values have changed to:

namservers:
--- ! "- <%= @host.subnet.dns_primary %>\r\n- <%= @host.subnet.dns_secondary %>"
searchpath
--- ! '- <%= @host.domain %>'

WHY? WHAT?

Don't change anything, press submit again and have a look at the host YAML wich is now _broken_.

classes:
  resolv_conf:
    nameservers: ! "- 192.168.102.254\r\n- 192.168.101.10"
    searchpath: ! '- lnx.example.com'