Bug 13981 - Transliterate rule for oe and ae

NOTE : I use HTML codes for special characters to avoir encoding issues in patch file.

In ICU configuration, add a transliterate rule for
œ = oe
æ = ae

Test plan :
- Without patch
- Create a record R1 with title containing for example "cœur"
- Create a record R2 with title containing for example "coeur"
- Index those records
- Search for "cœur"
=> You only find R1
- Search for "coeur"
=> You only find R2
- Apply patch
- Restart zebra
- Index R1 and R2
- Search for "cœur"
=> You find R1 and R2
- Search for "coeur"
=> You find R1 and R2
(Same test plan for ae)

------
Tested with all variants of Ae ae Oe oe. Search worked as expected.
Note: The words with special characters were not highlighted, but I think this can be done in an other bug.
Signed-off-by: Marc Veron <veron@veron.ch>

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>

etc/zebradb/etc/phrases-icu.xml

@@ -1,4 +1,8 @@
 <icu_chain locale="">
+  <transliterate rule="{ œ > oe "/>
+  <transliterate rule="{ Π> oe "/>
+  <transliterate rule="{ æ > ae "/>
+  <transliterate rule="{ Æ > ae "/>
   <!-- Remove control characters except \t\n\r -->
   <transform rule="[\x00-\x08\x0B\x0C\x0E-\x1F\x7F] Any-Remove"/>
   <tokenize rule="l"/>

etc/zebradb/etc/words-icu.xml

@@ -1,4 +1,8 @@
 <icu_chain locale="">
+  <transliterate rule="{ œ > oe "/>
+  <transliterate rule="{ Π> oe "/>
+  <transliterate rule="{ æ > ae "/>
+  <transliterate rule="{ Æ > ae "/>
   <transliterate rule="\'>\ "/>
   <transliterate rule="[:Number:] { '-' > '' "/>
   <!-- Remove control characters except \t\n\r -->