clarify cmake dependency message
clarify cmake dependency message

change the message:
BLA has unmet configuration requirements: MPI
has to be set to "ON".

to:
BLA has unmet configuration requirements: DEAL_II_WITH_MPI
has to be set to "ON".

naliboff/dealii,rrgrove6/dealii,kalj/dealii,maieneuro/dealii,sairajat/dealii,sriharisundar/dealii,ibkim11/dealii,natashasharma/dealii,sriharisundar/dealii,naliboff/dealii,ibkim11/dealii,EGP-CIG-REU/dealii,nicolacavallini/dealii,danshapero/dealii,msteigemann/dealii,shakirbsm/dealii,jperryhouts/dealii,nicolacavallini/dealii,JaeryunYim/dealii,spco/dealii,mac-a/dealii,JaeryunYim/dealii,shakirbsm/dealii,pesser/dealii,kalj/dealii,shakirbsm/dealii,mac-a/dealii,kalj/dealii,pesser/dealii,naliboff/dealii,sairajat/dealii,adamkosik/dealii,YongYang86/dealii,EGP-CIG-REU/dealii,danshapero/dealii,lue/dealii,maieneuro/dealii,spco/dealii,sriharisundar/dealii,rrgrove6/dealii,lpolster/dealii,angelrca/dealii,angelrca/dealii,johntfoster/dealii,lue/dealii,naliboff/dealii,johntfoster/dealii,Arezou-gh/dealii,JaeryunYim/dealii,kalj/dealii,angelrca/dealii,kalj/dealii,JaeryunYim/dealii,pesser/dealii,lpolster/dealii,lue/dealii,ESeNonFossiIo/dealii,Arezou-gh/dealii,EGP-CIG-REU/dealii,gpitton/dealii,natashasharma/dealii,sriharisundar/dealii,EGP-CIG-REU/dealii,adamkosik/dealii,johntfoster/dealii,kalj/dealii,pesser/dealii,natashasharma/dealii,lpolster/dealii,lue/dealii,msteigemann/dealii,gpitton/dealii,sairajat/dealii,andreamola/dealii,EGP-CIG-REU/dealii,johntfoster/dealii,lpolster/dealii,mac-a/dealii,Arezou-gh/dealii,msteigemann/dealii,Arezou-gh/dealii,ibkim11/dealii,angelrca/dealii,Arezou-gh/dealii,ibkim11/dealii,johntfoster/dealii,lpolster/dealii,jperryhouts/dealii,danshapero/dealii,maieneuro/dealii,shakirbsm/dealii,jperryhouts/dealii,sairajat/dealii,YongYang86/dealii,lue/dealii,lpolster/dealii,sriharisundar/dealii,msteigemann/dealii,andreamola/dealii,spco/dealii,spco/dealii,adamkosik/dealii,nicolacavallini/dealii,rrgrove6/dealii,mac-a/dealii,ESeNonFossiIo/dealii,andreamola/dealii,shakirbsm/dealii,johntfoster/dealii,mac-a/dealii,maieneuro/dealii,andreamola/dealii,msteigemann/dealii,naliboff/dealii,gpitton/dealii,pesser/dealii,ESeNonFossiIo/dealii,EGP-CIG-REU/dealii,gpitton/dealii,YongYang86/dealii,sriharisundar/dealii,lpolster/dealii,ESeNonFossiIo/dealii,rrgrove6/dealii,mac-a/dealii,mac-a/dealii,JaeryunYim/dealii,natashasharma/dealii,lue/dealii,lue/dealii,adamkosik/dealii,sriharisundar/dealii,pesser/dealii,danshapero/dealii,YongYang86/dealii,Arezou-gh/dealii,msteigemann/dealii,andreamola/dealii,angelrca/dealii,jperryhouts/dealii,gpitton/dealii,msteigemann/dealii,johntfoster/dealii,kalj/dealii,ibkim11/dealii,maieneuro/dealii,JaeryunYim/dealii,Arezou-gh/dealii,YongYang86/dealii,jperryhouts/dealii,ESeNonFossiIo/dealii,natashasharma/dealii,maieneuro/dealii,nicolacavallini/dealii,angelrca/dealii,EGP-CIG-REU/dealii,spco/dealii,pesser/dealii,jperryhouts/dealii,nicolacavallini/dealii,ibkim11/dealii,andreamola/dealii,adamkosik/dealii,gpitton/dealii,shakirbsm/dealii,rrgrove6/dealii,maieneuro/dealii,naliboff/dealii,nicolacavallini/dealii,spco/dealii,danshapero/dealii,danshapero/dealii,danshapero/dealii,rrgrove6/dealii,YongYang86/dealii,gpitton/dealii,ESeNonFossiIo/dealii,nicolacavallini/dealii,rrgrove6/dealii,ESeNonFossiIo/dealii,ibkim11/dealii,jperryhouts/dealii,natashasharma/dealii,sairajat/dealii,angelrca/dealii,adamkosik/dealii,naliboff/dealii,adamkosik/dealii,shakirbsm/dealii,andreamola/dealii,sairajat/dealii,natashasharma/dealii,YongYang86/dealii,JaeryunYim/dealii,sairajat/dealii,spco/dealii