CONFIG: revert to openmpi-1.10.4

- this is the same version as OpenFOAM-1612 shipped with and seems to
  have fewer issues than the newer openmpi-2.1.1

BUILD.md

@@ -318,7 +318,7 @@ GNU *configure* can only be used prior to clang version 3.9.
 |-----------------------|------------------------
 | [adios][page adios]   | [repo][repo adios] or [github download][link adios] or [alt download][altlink adios]
 | [scotch, ptscotch][page scotch] | [download][link scotch]
-| [openmpi][page openmpi] | [download][link openmpi]
+| [openmpi][page openmpi] | [download][link openmpi]. The newer [openmpi][newer openmpi] make exhibit stability issues.
 
 
 ### General <a name="general-packages"></a>
@@ -406,7 +406,8 @@ The minimum gcc/g++ requirements for building various components.
 [link scotch]:    https://gforge.inria.fr/frs/download.php/file/34099/scotch_6.0.3.tar.gz
 
 [page openmpi]:   http://www.open-mpi.org/
-[link openmpi]:   https://www.open-mpi.org/software/ompi/v2.1/downloads/openmpi-2.1.1.tar.bz2
+[link openmpi]:   https://www.open-mpi.org/software/ompi/v1.10/downloads/openmpi-1.10.4.tar.bz2
+[newer openmpi]:  https://www.open-mpi.org/software/ompi/v2.1/downloads/openmpi-2.1.1.tar.bz2
 
 
 <!-- general -->

sources.txt

 Third-Party Sources
 ===================
 
-OpenFOAM+ v1612
+OpenFOAM-1706
+---------------
+CGAL-4.9.1
+ParaView-5.4.0
+boost_1_64_0
+fftw-3.3.6-pl1
+openmpi-1.10.4
+scotch_6.0.3
+
+
+OpenFOAM-1612
 ---------------
 CGAL-4.9
 ParaView-5.0.1
@@ -11,7 +21,7 @@ openmpi-1.10.4
 scotch_6.0.3
 
 
-OpenFOAM+ v1606
+OpenFOAM-1606
 ---------------
 CGAL-4.8
 ParaView-5.0.1
@@ -21,7 +31,7 @@ openmpi-1.10.2
 scotch_6.0.3
 
 
-OpenFOAM+ v3.0
+OpenFOAM v3.0+
 ---------------
 CGAL-4.7
 ParaView-4.4.0