Improve parameter name of the JenkinsCiPluginRepository

The findArtifact() method has now a better parameter name for
finding all the artifacts that have a specific suffix.

Change-Id: I1296a8101d483afb3a07b2558357200683c03e41
(cherry picked from commit 4f185f2096e5e4a03553fed91333fe3d582ebcad)

src/main/java/com/googlesource/gerrit/plugins/manager/repository/JenkinsCiPluginsRepository.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/manager/repository/JenkinsCiPluginsRepository.java b/src/main/java/com/googlesource/gerrit/plugins/manager/repository/JenkinsCiPluginsRepository.java
index 48dac31..dc124f4 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/manager/repository/JenkinsCiPluginsRepository.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/manager/repository/JenkinsCiPluginsRepository.java
@@ -303,11 +303,11 @@
     return pluginPathParts[pluginPathParts.length - 2].equals("target");
   }
 
-  private Optional<SmartJson> findArtifact(JsonArray artifacts, String string) {
+  private Optional<SmartJson> findArtifact(JsonArray artifacts, String artifactSuffix) {
     for (int i = 0; i < artifacts.size(); i++) {
       SmartJson artifact = SmartJson.of(artifacts.get(i));
       String path = artifact.getString("relativePath");
-      if (path.endsWith(string) && !path.endsWith("-static" + string)) {
+      if (path.endsWith(artifactSuffix) && !path.endsWith("-static" + artifactSuffix)) {
         return Optional.of(artifact);
       }
     }