compareToAscii -> equalsAscii

convert places using compareToAscii that should be using equalsAscii

Change-Id: I97b4da7f6e867c3967b2f65b70d6886f83b4a4e5
compareTo -> equals

convert OUString::compareTo usage to equals to startsWith where it
is more appropriate

Change-Id: I6f5b5b7942429c0099ad082ba4984fd18e422121