tests: unittests: Rename to test-hal-api-common.cc for using correct name

test_hal.cc contains the test code of  hal-api-common funcitons.
In order to pass the correct meaning of file, rename from test_hal.cc
to test-hal-api-common.cc.

Also, rename from test_main.cc to test-main.cc by using '-' instead of
'_'.

Change-Id: Ibf8dd8aebb24ea231b87e4fb7ebad98c01afcd91
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

diff --git a/tests/unittest/test_hal.cc b/tests/unittest/test-hal-api-common.cc
similarity index 100%
rename from tests/unittest/test_hal.cc
rename to tests/unittest/test-hal-api-common.cc

diff --git a/tests/unittest/test_main.cc b/tests/unittest/test-main.cc
similarity index 100%
rename from tests/unittest/test_main.cc
rename to tests/unittest/test-main.cc