Rename to follow usual naming conventions.

diff --git a/tests/base/product_type_01-symmetric.cc b/tests/base/product_type_01_symmetric.cc
similarity index 100%
rename from tests/base/product_type_01-symmetric.cc
rename to tests/base/product_type_01_symmetric.cc

diff --git a/tests/base/product_type_01-symmetric.output b/tests/base/product_type_01_symmetric.output
similarity index 100%
rename from tests/base/product_type_01-symmetric.output
rename to tests/base/product_type_01_symmetric.output

diff --git a/tests/base/product_type_03-symmetric.cc b/tests/base/product_type_03_symmetric.cc
similarity index 100%
rename from tests/base/product_type_03-symmetric.cc
rename to tests/base/product_type_03_symmetric.cc

diff --git a/tests/base/product_type_03-symmetric.output b/tests/base/product_type_03_symmetric.output
similarity index 100%
rename from tests/base/product_type_03-symmetric.output
rename to tests/base/product_type_03_symmetric.output