ENH: AMI: refactored parallel handling to be local to the AMI method

...ools/AMIInterpolation/AMIInterpolation/AMIInterpolation.C

...ools/AMIInterpolation/AMIInterpolation/AMIInterpolation.H

...polation/AMIInterpolation/AMIMethod/AMIMethod/AMIMethod.C

...polation/AMIInterpolation/AMIMethod/AMIMethod/AMIMethod.H

...olation/AMIInterpolation/AMIMethod/AMIMethod/AMIMethodI.H

...IInterpolation/AMIMethod/AMIMethod/AMIMethodParallelOps.C

...polation/AMIInterpolation/AMIMethod/directAMI/directAMI.C

...polation/AMIInterpolation/AMIMethod/directAMI/directAMI.H

...rpolation/AMIMethod/faceAreaWeightAMI/faceAreaWeightAMI.C

...rpolation/AMIMethod/faceAreaWeightAMI/faceAreaWeightAMI.H

.../AMIInterpolation/AMIMethod/mapNearestAMI/mapNearestAMI.C

.../AMIInterpolation/AMIMethod/mapNearestAMI/mapNearestAMI.H

...ethod/partialFaceAreaWeightAMI/partialFaceAreaWeightAMI.C

...ethod/partialFaceAreaWeightAMI/partialFaceAreaWeightAMI.H