GUACAMOLE-197: Doesn't make sense to default the key file to radius.pem and have it trying to use pkcs12 as the default keystore type. Set it all to PEM for consistency.

extensions/guacamole-auth-radius/src/main/java/org/apache/guacamole/auth/radius/ConfigurationService.java

@@ -188,7 +188,7 @@ public class ConfigurationService {
     public String getRadiusCAType() throws GuacamoleException {
         return environment.getProperty(
             RadiusGuacamoleProperties.RADIUS_CA_TYPE,
-            "pkcs12"
+            "pem"
         );
     }
 
@@ -202,7 +202,7 @@ public class ConfigurationService {
     public String getRadiusKeyType() throws GuacamoleException {
         return environment.getProperty(
             RadiusGuacamoleProperties.RADIUS_KEY_TYPE,
-            "pkcs12"
+            "pem"
         );
     }