BUG: adding case path to support parallel execution (Fixes #449)

src/finiteVolume/fields/fvPatchFields/derived/timeVaryingMappedFixedValue/timeVaryingMappedFixedValueFvPatchField.C

@@ -416,7 +416,8 @@ void Foam::timeVaryingMappedFixedValueFvPatchField<Type>::checkTable()
             // Reread values and interpolate
             fileName valsFile
             (
-                this->db().time().caseConstant()
+                this->db().time().path()
+               /this->db().time().caseConstant()
                /"boundaryData"
                /this->patch().name()
                /sampleTimes_[endSampleTime_].name()