ENH: scotch: make repeatable. Fixes #1274.

src/parallel/decompose/ptscotchDecomp/ptscotchDecomp.C

@@ -549,6 +549,10 @@ Foam::label Foam::ptscotchDecomp::decompose
         }
     }
 
+
+    // Make repeatable
+    SCOTCH_randomReset();
+
     // Strategy
     // ~~~~~~~~
 

src/parallel/decompose/scotchDecomp/scotchDecomp.C

@@ -236,6 +236,9 @@ Foam::label Foam::scotchDecomp::decomposeSerial
         }
     }
 
+    // Make repeatable
+    SCOTCH_randomReset();
+
     // Strategy
     // ~~~~~~~~