Sitecore Experience Manager 8.0 and Sitecore Experience Manager 8.1 Solr Index Core Naming Patch file.

zz.Solr.Index.CorePatch.xml

<!-- NOTE: After download rename to '.CONFIG', xml is used for better formating in Gist-->
<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/">
  <sitecore>        
    <contentSearch>
      <configuration type="Sitecore.ContentSearch.ContentSearchConfiguration, Sitecore.ContentSearch">
        <indexes hint="list:AddIndex">
          <index id="sitecore_master_index" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">    
            <param desc="core">itembuckets</param>
          </index>
          <index id="sitecore_web_index" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">    
            <param desc="core">itembuckets</param>
          </index>
          <index id="sitecore_core_index" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">    
            <param desc="core">itembuckets</param>
          </index>
          <index id="sitecore_analytics_index" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">    
            <param desc="core">itembuckets</param>
          </index>
          <index id="sitecore_testing_index" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">    
            <param desc="core">itembuckets</param>
          </index>
          <index id="sitecore_suggested_test_index" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">    
            <param desc="core">itembuckets</param>
          </index>
          <index id="sitecore_fxm_web_index" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">    
            <param desc="core">itembuckets</param>            
          </index>
          <index id="sitecore_fxm_master_index" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">    
            <param desc="core">itembuckets</param>            
          </index>
          <index id="sitecore_list_index" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">    
            <param desc="core">itembuckets</param>
          </index>
          <index id="social_messages_master" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">    
            <param desc="core">itembuckets</param>
          </index>
          <index id="social_messages_web" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">    
            <param desc="core">itembuckets</param>
          </index>
          <index id="sitecore_marketing_asset_index_master" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">    
            <param desc="core">itembuckets</param>
          </index>
          <index id="sitecore_marketing_asset_index_web" type="Sitecore.ContentSearch.SolrProvider.SolrSearchIndex, Sitecore.ContentSearch.SolrProvider">    
            <param desc="core">itembuckets</param>
          </index>
        </indexes>
      </configuration>
    </contentSearch>
  </sitecore>
</configuration>