Install packages into virtual envs as to satisfy app requirements.

        Exact version numbers could be given as in PIP: somedep==1.5

        :param list names:

def op_install_package(self, names):
        """Install packages into virtual envs as to satisfy app requirements.

        Exact version numbers could be given as in PIP: somedep==1.5

        :param list names:

        """
        venvs = self.get_venvs()
        for venv in venvs:
            for name in names:
                self.venv_install(name, self._get_venv_path(venv))