Use common_name for countries when they exists

Diff from mentors:

--- mentors	2019-05-22 18:09:27.861755063 +0200
+++ local	2019-05-22 18:09:25.108443389 +0200
@@ -23,7 +23,7 @@
 Benin
 Bermuda
 Bhutan
-Bolivia, Plurinational State of
+Bolivia
 Bonaire, Sint Eustatius and Saba
 Bosnia and Herzegovina
 Botswana
@@ -34,10 +34,10 @@
 Bulgaria
 Burkina Faso
 Burundi
+Cabo Verde
 Cambodia
 Cameroon
 Canada
-Cape Verde
 Cayman Islands
 Central African Republic
 Chad
@@ -55,7 +55,7 @@
 Cuba
 Curaçao
 Cyprus
-Czech Republic
+Czechia
 Côte d'Ivoire
 Denmark
 Djibouti
@@ -124,7 +124,6 @@
 Lesotho
 Liberia
 Libya
-Libyan Arab Jamahiriya
 Liechtenstein
 Lithuania
 Luxembourg
@@ -143,7 +142,7 @@
 Mayotte
 Mexico
 Micronesia, Federated States of
-Moldova, Republic of
+Moldova
 Monaco
 Mongolia
 Montenegro
@@ -155,7 +154,6 @@
 Nauru
 Nepal
 Netherlands
-Netherlands Antilles
 New Caledonia
 New Zealand
 Nicaragua
@@ -169,7 +167,6 @@
 Pakistan
 Palau
 Palestine, State of
-Palestinian Territory, Occupied
 Panama
 Papua New Guinea
 Paraguay
@@ -180,7 +177,6 @@
 Portugal
 Puerto Rico
 Qatar
-Reunion
 Romania
 Russian Federation
 Rwanda
@@ -218,9 +214,9 @@
 Sweden
 Switzerland
 Syrian Arab Republic
-Taiwan, Province of China
+Taiwan
 Tajikistan
-Tanzania, United Republic of
+Tanzania
 Thailand
 Timor-Leste
 Togo
@@ -239,13 +235,10 @@
 United States
 United States Minor Outlying Islands
 Uruguay
-Uruguay
-Uruguay
 Uzbekistan
 Vanuatu
-Venezuela, Bolivarian Republic of
-Venezuela, Bolivarian republic of
-Viet Nam
+Venezuela
+Vietnam
 Virgin Islands, British
 Virgin Islands, U.S.
 Wallis and Futuna