Extrapolation moved to base Process

* no property tags anymore
* no templates anymore in the implementation
* all template use is in the adaptor class

Fix warnings

Removed unused code.

warning: suggest braces around initialization of subobject

Fixed warning: field '_range' will be initialized after field '_type'

Allow PETSc run with only one CPU core

[NonZeroPattern] Fixed a bug in the calculation of sparsity pattern for TES and other processes with DOF (per node) >1

avoid PETSc error in the assignment operator.

and added test for np=1 for parallel computing with PETSc.