replace mesh in interpolation test

any small, simple, 2D mesh would work, already available mesh in pcms_testcase repository makes more sense.

Author: Fuad-HH

test/CMakeLists.txt

@@ -503,7 +503,7 @@ if(PCMS_ENABLE_Fortran)
   add_test(
     NAME test_interpolation_fortran_api
     COMMAND
-    $<TARGET_FILE:test_interpolation_fortran_api> ${PCMS_TEST_DATA_DIR}/square10x102D.osh 200 121
+    $<TARGET_FILE:test_interpolation_fortran_api> ${PCMS_TEST_DATA_DIR}/cyclone/23elements/mesh.osh 23 19
   )
 
   if(HOST_NPROC GREATER_EQUAL 4)

test/test_interpolation.f90

@@ -79,7 +79,7 @@ program test_interpolation
     do i = 1, num_vertices
         print *, "(", i, ", ", target_at_vertex(i), ")"
         ! if values are not close to 2.0, then the interpolation is not working; exit with error
-        if (abs(target_at_vertex(i) - 2.0d0) > 1.0d-6) then
+        if (abs(target_at_vertex(i) - 2.0d0) > 1.0d-4) then
             print *, "Interpolation failed, expected about 2.0, got ", target_at_vertex(i)
             stop 1
         end if