TACHYON-8 [WIP] First drop of Tachyon neo configuration

The PR includes:
-) TACHYON-193
Add new Tachyon properties file configuration.  
Add new code to support Tachyon properties configuration for runtime. 
This will be file based could be overriden via site specific configuration file or override collection in the TachyonConf class.
-) TACHYON-194
Add TachyonConf class to unify all Tachyon configurations.
Use single class TachyonConf to manage the configurations properties as key-value store.

I don't like making private things accessible since it causes bugs.

If you make this method private, it solves both problems
On Nov 14, 2014 6:18 PM, "Henry Saputra" <notifications@github.com> wrote:

> In core/src/main/java/tachyon/conf/TachyonConf.java:
>
> > +
> > +    // user
> > +    runtimeProps.setProperty(Constants.USER_QUOTA_UNIT_BYTES,
> > +        Integer.toString(8 * Constants.MB));
> > +    runtimeProps.setProperty(Constants.USER_FILE_BUFFER_BYTES,
> > +        Integer.toString(Constants.MB));
> > +    runtimeProps.setProperty(Constants.USER_REMOTE_READ_BUFFER_SIZE_BYTE,
> > +        Integer.toString(Constants.MB));
> > +
> > +    return runtimeProps;
> > +  }
> > +
> > +  /**
> > +   * @return the internal <code>Properties</code> of this TachyonConf instance.
> > +   */
> > +  protected Properties getInternalProperties() {
>
> I don't like access to private field for other object
>
> —
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> <https://github.com/amplab/tachyon/pull/529/files#r20398833>.
>