Update Resource javadoc to clarify units for memory

These values are supposed to be megabytes (need to check MB vs MiB ie 1000 vs 1024)

/**

• Get <em>memory</em> of the resource.
• @return <em>memory</em> of the resource
  */
  @Public
  @Stable
  public abstract int getMemory();

/**

• Set <em>memory</em> of the resource.
• @param memory <em>memory</em> of the resource
  */
  @Public
  @Stable
  public abstract void setMemory(int memory);