[Misc] Improve variable name and reuse it more

xwiki-platform-core/xwiki-platform-search/xwiki-platform-search-solr/xwiki-platform-search-solr-api/src/main/java/org/xwiki/search/solr/internal/AbstractSolr.java

@@ -155,9 +155,9 @@ protected void migrateCore(String xwikiCoreName, XWikiSolrCore newCore, SolrCore
         throws SolrException, SolrServerException, IOException
     {
         Integer sVersion = getSVersion(newCore);
-        int solrVersion = getSolrMajorVersion();
-        if (sVersion == null || sVersion < getSolrMajorVersion()) {
-            for (int previousVersion = solrVersion - 1; previousVersion >= 8; --previousVersion) {
+        int solrMajorVersion = getSolrMajorVersion();
+        if (sVersion == null || sVersion < solrMajorVersion) {
+            for (int previousVersion = solrMajorVersion - 1; previousVersion >= 8; --previousVersion) {
                 // Check if a core for this version of Solr exist
                 XWikiSolrCore previousCore = getCore(xwikiCoreName, previousVersion, false);
 
@@ -178,7 +178,7 @@ protected void migrateCore(String xwikiCoreName, XWikiSolrCore newCore, SolrCore
             }
 
             // Mark the core as fully migrated
-            setSVersion(newCore, solrVersion, sVersion == null);
+            setSVersion(newCore, solrMajorVersion, sVersion == null);
         }
     }