Should also detect names with accent and case variations

[naoliv]

Have two highways, one named Rua São João and another Rua Sao Joao
Validate the data and see a proper warning about Similarly named ways

Now change the last highway name from Rua Sao Joao to Rua SAO JOAO and validate again.
We have no warnings anymore (which is wrong).

It seems that the Similarly named ways test should be also catch such kind of variations (accents and case).

JOSM:

URL:http://josm.openstreetmap.de/svn/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2017-05-29 16:19:58 +0200 (Mon, 29 May 2017)
Build-Date:2017-05-29 14:25:03
Revision:12275
Relative:URL: ^/trunk

Identification: JOSM/1.5 (12275 en) Linux Debian GNU/Linux 9 (stretch)
Memory Usage: 247 MB / 10206 MB (84 MB allocated, but free)
Java version: 1.8.0_131-8u131-b11-2-b11, Oracle Corporation, OpenJDK 64-Bit Server VM
Screen: :0.0 1600x900, :0.1 1280x1024
Maximum Screen Size: 1600x1024
Java package: openjdk-8-jre:amd64-8u131-b11-2
Java ATK Wrapper package: libatk-wrapper-java:all-0.33.3-13
VM arguments: [-Dawt.useSystemAAFontSettings=on]
Program arguments: [--language=en]
Dataset consistency test: No problems found