Added unit test of setBasetgz(), setBasepath().

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Added unit test of preparePbuilderrc().

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Added unit test of retrieveSrcPkg().

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>
Appended verbose and cover option to go test command.

Signed-off-by: Kouhei Maeda <mkouhei@palmtb.net>