Read encrypted vars in install() so it won't break session_setup()

WAPT/control

@@ -1,5 +1,5 @@
 package           : fws-chrome
-version           : 78.0.3904.108-6
+version           : 78.0.3904.108-8
 architecture      : all
 section           : base
 priority          : optional
@@ -27,12 +27,12 @@ editor            : Google
 keywords          : browser,navigateur,Google,Chrome,Chromium
 licence           : Freeware
 homepage          : https://www.google.com/chrome/
-package_uuid      : a154eb6c-cd7d-4e19-9d75-43596d8595a7
+package_uuid      : d4efb932-9b4f-4b61-bea8-0ad5f205a80a
 valid_from        : 
 valid_until       : 
 forced_install_on : 
 signer            : Daniel Berteaud
 signer_fingerprint: 3c9415559e2dedbc4390e3faa2c28d3b67265baa5b35902d2764d9e41c3b3f0a
-signature         : tZph2uBpBxXMgtr7lxh6/Qa5U3UEaeK67CS7NAwx0/hmI9hlSmtWTPYrhOUAa6rDjTOwY1hR76ojdLlYLRK4W7yzZG0ej6QxammWEh3qzh47mHADMwXiVxzktvYfrBj/mVRjdX/G5Z0hPHqCyAlMraXZkVa9HnWqY/FNswkOyYmayEW5HTJg+K9JE8yEGnd5VAnzKqrBIXo2aTcwCDcctiNqrTEOhcrNBZfA0gcC/yHwbKkmeP3Z1zLdMOUyIazsxZ5qqfeHRzVHXAG9u1wPFaQjNJt70eMUdXZ4UlmVWTMzBNlcMJnDo65LjL+LkRiunTYVKNSUSKzG8WyS3wygmg==
-signature_date    : 2019-11-21T11:12:26.124000
+signature         : VGjpn2sqS4XO5yzhVh+19JHCKdIj6TWmIG8r1cWwNdIhT578OlLV408h3h4cXsFY/07wZFnteugdZiKp6UeUGpx0wS8faZpEGrboz3dW6zcNz0zMiTNQ8Zz+cLucJyyY4OQU2DPn8QbwPlDThc7n3BXp9d5OvsbiGKEGs28Hf7G0W2eFwKmda6HymIHpde1EHlZbNgl+0PGlHp5++H2NCsuaTYT94wzBFThqeJBOU13vUE0w/QHNfsIWKyQJSPwBI4xPmKNa9YusS6OMvunMxbHs0JQ0M+QuR4sC6yOXne6YLJZyC9jAyYmpibjRJvXisDP53kcerCIILuxdiKYn4g==
+signature_date    : 2019-12-10T18:24:50.659000
 signed_attributes : package,version,architecture,section,priority,name,categories,maintainer,description,depends,conflicts,maturity,locale,target_os,min_os_version,max_os_version,min_wapt_version,sources,installed_size,impacted_process,description_fr,description_pl,description_de,description_es,audit_schedule,editor,keywords,licence,homepage,package_uuid,valid_from,valid_until,forced_install_on,signer,signer_fingerprint,signature_date,signed_attributes

setup.py

@@ -13,15 +13,16 @@ chrome_app_path=makepath(programfiles32,'Google','Chrome','Application')
 chrome_bin_path=makepath(chrome_app_path,'chrome.exe')
 bin_name = 'googlechromestandaloneenterprise64.msi' if iswin64() else 'googlechromestandaloneenterprise.msi'
 
-# Read local variables file if available
-if isfile(makepath(programfiles32,'wapt','private','symetric.txt')) and isfile(makepath(programfiles32,'wapt','private','variables.txt')):
-    print('Reading local encrypted variables file')
-    from cryptography.fernet import Fernet
-    import yaml
-    f = Fernet(open(makepath(programfiles32,'wapt','private','symetric.txt'),'r').read())
-    variables.update(yaml.safe_load(f.decrypt(open(makepath(programfiles32,'wapt','private','variables.txt'),'r').read())))
-
 def install():
+
+    # Read local variables file if available
+    if isfile(makepath(programfiles32,'wapt','private','symetric.txt')) and isfile(makepath(programfiles32,'wapt','private','variables.txt')):
+        print('Reading local encrypted variables file')
+        from cryptography.fernet import Fernet
+        import yaml
+        f = Fernet(open(makepath(programfiles32,'wapt','private','symetric.txt'),'r').read())
+        variables.update(yaml.safe_load(f.decrypt(open(makepath(programfiles32,'wapt','private','variables.txt'),'r').read())))
+
     print('Installing %s' % control.asrequirement())
 
     # Specific app values