【背景】
【OpenHarmony】【master】L1 liteos测试执行liteos_a_libc_unittest.bin 测试模块，测试套SysTest 1条用例Fail

【修改方案】
将先前更改locale的地方将locale设置为默认值

【影响】
对现有的产品编译不会有影响。

re #I4SQDP
Signed-off-by: Nyinjiaming <yinjiaming@huawei.com>
Change-Id: I4cd5d5d59aa3ff8ece469ee7a61054f3d4635f45

close: #I4OX3O
Signed-off-by: Narvinzzz <zhaotianyu9@huawei.com>

Change-Id: I3ba65509135cee2ae3af82fec923a01e00ffdbe8

1.modifications:
    modified:   testsuites/unittest/IO/It_test_IO.h
    modified:   testsuites/unittest/IO/full/IO_test_duplocale_001.cpp
    modified:   testsuites/unittest/IO/io_test.cpp
2.add 19 testcases:
    IO_test_dcgettext_001.cpp
    IO_test_dcgettext_002.cpp
    IO_test_dcngettext_001.cpp
    IO_test_dcngettext_002.cpp
    IO_test_dngettext_001.cpp
    IO_test_dngettext_002.cpp
    IO_test_duplocale_001.cpp
    IO_test_locale_001.cpp
    IO_test_ngettext_001.cpp
    IO_test_nl_langinfo_001.cpp
    IO_test_nl_langinfo_l_001.cpp
    IO_test_strcasecmp_l_001.cpp
    IO_test_strfmon_l_001.cpp
    IO_test_strncasecmp_l_001.cpp
    It_stdio_hasmntopt_001.cpp
    IO_test_gettext_001.cpp
    IO_test_locale_002.cpp
    IO_test_strcasecmp_l_002.cpp
    IO_test_strfmon_l_002.cpp
    IO_test_strncasecmp_l_002.cpp
3.influence:
    none
Signed-off-by: Nliuzhiwan <liuzhiwan2020@163.com>
Change-Id: Ib5883ddb14cfd545f2c5b1685a082f098def0965

Change-Id: Ice1193d1ae7f2e0d12a2a38a306a6399407f5037