[slapos_web_deploy] use pip instead of easy_install

easy_install is not provided python-setuptools package for ubuntu 18.04. It seems easy_install is being removed

master/bt5/slapos_web_deploy/PathTemplateItem/web_page_module/deploy_base_setup.txt

@@ -126,7 +126,7 @@ is_package_installed unzip || install_package unzip
 is_package_installed openssl || install_package openssl
 is_package_installed ansible || install_package ansible
 
-is_package_installed python-setuptools || install_package python-setuptools
+is_package_installed python-pip || install_package python-pip
 
 if is_fedora && [[ $DISTRO == "f26" ]]; then
   is_package_installed python2-rpm || install_package python2-rpm
@@ -237,8 +237,8 @@ class CallbackModule(baseModule):
 
 EOF
 
-ansible localhost -m easy_install -a name=slapcache --connection=local
-ansible localhost -m easy_install -a name=requests --connection=local
+ansible localhost -m pip -a name=slapcache --connection=local
+ansible localhost -m pip -a name=requests --connection=local
 
 if [ ! -f /usr/share/ansible_plugins/mitogen.zip ]; then
     wget -O /usr/share/ansible_plugins/mitogen.zip https://github.com/dw/mitogen/archive/2d7821b824a77930812847c87ea385cf37198c3f.zip