[PATCH 2 of 2] Ensure the build does not fail due to non-ASCII characters

[Wald Commits]

# HG changeset patch
# User Tom Gottfried <tom at intevation.de>
# Date 1589911664 -7200
#      Tue May 19 20:07:44 2020 +0200
# Branch 3.2.x
# Node ID aee871c6059987606aad2defc3d03f8b32434d06
# Parent  5b258de7f5a144917fae9a962c6dab158b27e8c0
Ensure the build does not fail due to non-ASCII characters

E.g. umlauts in the headers currently can lead to failing builds.

diff -r 5b258de7f5a1 -r aee871c60599 artifacts/pom-oracle.xml
--- a/artifacts/pom-oracle.xml	Tue May 19 20:04:08 2020 +0200
+++ b/artifacts/pom-oracle.xml	Tue May 19 20:07:44 2020 +0200
@@ -23,6 +23,7 @@
           <configuration>
               <source>1.7</source>
               <target>1.7</target>
+              <encoding>UTF-8</encoding>
           </configuration>
       </plugin>
       <plugin>
diff -r 5b258de7f5a1 -r aee871c60599 artifacts/pom.xml
--- a/artifacts/pom.xml	Tue May 19 20:04:08 2020 +0200
+++ b/artifacts/pom.xml	Tue May 19 20:07:44 2020 +0200
@@ -23,6 +23,7 @@
           <configuration>
               <source>1.7</source>
               <target>1.7</target>
+              <encoding>UTF-8</encoding>
           </configuration>
       </plugin>
       <plugin>
diff -r 5b258de7f5a1 -r aee871c60599 backend/pom-oracle.xml
--- a/backend/pom-oracle.xml	Tue May 19 20:04:08 2020 +0200
+++ b/backend/pom-oracle.xml	Tue May 19 20:07:44 2020 +0200
@@ -23,6 +23,7 @@
         <configuration>
           <source>1.7</source>
           <target>1.7</target>
+          <encoding>UTF-8</encoding>
         </configuration>
       </plugin>
       <plugin>
diff -r 5b258de7f5a1 -r aee871c60599 backend/pom.xml
--- a/backend/pom.xml	Tue May 19 20:04:08 2020 +0200
+++ b/backend/pom.xml	Tue May 19 20:07:44 2020 +0200
@@ -23,6 +23,7 @@
         <configuration>
           <source>1.7</source>
           <target>1.7</target>
+          <encoding>UTF-8</encoding>
         </configuration>
       </plugin>
       <plugin>