Remove redundant prefix from the name

pyac_tests/ directory is located inside pyac/ already,
so "pyac_" prefix is not helpful.

diff --git a/pyac/pyac_tests/__init__.py b/pyac/tests/__init__.py
similarity index 100%
rename from pyac/pyac_tests/__init__.py
rename to pyac/tests/__init__.py

diff --git a/pyac/pyac_tests/test_blob.py b/pyac/tests/test_blob.py
similarity index 100%
rename from pyac/pyac_tests/test_blob.py
rename to pyac/tests/test_blob.py

diff --git a/pyac/pyac_tests/test_bool.py b/pyac/tests/test_bool.py
similarity index 100%
rename from pyac/pyac_tests/test_bool.py
rename to pyac/tests/test_bool.py

diff --git a/pyac/pyac_tests/test_errors.py b/pyac/tests/test_errors.py
similarity index 100%
rename from pyac/pyac_tests/test_errors.py
rename to pyac/tests/test_errors.py

diff --git a/pyac/pyac_tests/test_float.py b/pyac/tests/test_float.py
similarity index 100%
rename from pyac/pyac_tests/test_float.py
rename to pyac/tests/test_float.py

diff --git a/pyac/pyac_tests/test_int.py b/pyac/tests/test_int.py
similarity index 100%
rename from pyac/pyac_tests/test_int.py
rename to pyac/tests/test_int.py

diff --git a/pyac/pyac_tests/test_list.py b/pyac/tests/test_list.py
similarity index 100%
rename from pyac/pyac_tests/test_list.py
rename to pyac/tests/test_list.py

diff --git a/pyac/pyac_tests/test_map.py b/pyac/tests/test_map.py
similarity index 100%
rename from pyac/pyac_tests/test_map.py
rename to pyac/tests/test_map.py

diff --git a/pyac/pyac_tests/test_misc.py b/pyac/tests/test_misc.py
similarity index 100%
rename from pyac/pyac_tests/test_misc.py
rename to pyac/tests/test_misc.py

diff --git a/pyac/pyac_tests/test_raw.py b/pyac/tests/test_raw.py
similarity index 100%
rename from pyac/pyac_tests/test_raw.py
rename to pyac/tests/test_raw.py

diff --git a/pyac/pyac_tests/test_str.py b/pyac/tests/test_str.py
similarity index 100%
rename from pyac/pyac_tests/test_str.py
rename to pyac/tests/test_str.py

diff --git a/pyac/pyac_tests/test_symmetric.py b/pyac/tests/test_symmetric.py
similarity index 100%
rename from pyac/pyac_tests/test_symmetric.py
rename to pyac/tests/test_symmetric.py

diff --git a/pyac/pyac_tests/test_tai.py b/pyac/tests/test_tai.py
similarity index 100%
rename from pyac/pyac_tests/test_tai.py
rename to pyac/tests/test_tai.py

diff --git a/pyac/pyac_tests/test_uuid.py b/pyac/tests/test_uuid.py
similarity index 100%
rename from pyac/pyac_tests/test_uuid.py
rename to pyac/tests/test_uuid.py