Remove useage of "bootstrap_size=1" in sample data

### Issue
The installation sample data has some modules where the `bootstrap_size` parameter is set to `1`. That doesn't matter currently because the module cromes used in those positions don't use that parameter.
However if you switch the "Module Style" (chrome) in the module advanced tab to `html5`, then this parameter will be used and you see the funny effect of it. Which makes it obvious that this value is crap and should be removed.

This pictures are taken with the testing samle data when the "Module Style" for the "All Front End Views" module is set to `html5`:
**Buggy "All Front End Views" module**:
![bug](https://cloud.githubusercontent.com/assets/1018684/2729401/fddb7656-c608-11e3-8dc0-a53bb8d78503.jpg)
**Expected**:
![correct](https://cloud.githubusercontent.com/assets/1018684/2729402/ffb4cee6-c608-11e3-8bc1-8a905718ccb8.jpg)

### Solution
This PR changes the value of the `bootstrap_size` from `1` to the default `0`.
It only changes the values for new installations. So nothing will break for existing sites.

#### Affected Modules
**blog**
- Older Posts
- Image

**brochure**
- Main Menu
- Login Form
- News Flash
- Footer
- Image

**learn**
- Top
- Australian Parks
- Latest Park Blogs
- About Parks
- Fruit Shop
- Image Module
- Custom HTML
- Parks Image Module

**testing**
- Top
- All Frontend Views
- Fruit Shop