Disable Solr caches

- Addresses #758

Signed-off-by: Wade Barnes <wade@neoterictech.ca>

server/solr/cores/credential_registry/conf/solrconfig.xml

@@ -440,7 +440,7 @@
                       to occupy. Note that when this option is specified, the size
                       and initialSize parameters are ignored.
       -->
-    <filterCache class="solr.FastLRUCache" size="512" initialSize="512" autowarmCount="0"/>
+    <filterCache class="solr.FastLRUCache" size="0" initialSize="0" autowarmCount="0"/>
 
     <!-- Query Result Cache
 
@@ -450,15 +450,15 @@
             maxRamMB - the maximum amount of RAM (in MB) that this cache is allowed
                        to occupy
       -->
-    <queryResultCache class="solr.LRUCache" size="512" initialSize="512" autowarmCount="0"/>
+    <queryResultCache class="solr.LRUCache" size="0" initialSize="0" autowarmCount="0"/>
 
     <!-- Document Cache
 
          Caches Lucene Document objects (the stored fields for each
          document).  Since Lucene internal document ids are transient,
          this cache will not be autowarmed.
       -->
-    <documentCache class="solr.LRUCache" size="512" initialSize="512" autowarmCount="0"/>
+    <documentCache class="solr.LRUCache" size="0" initialSize="0" autowarmCount="0"/>
 
     <!-- custom cache currently used by block join -->
     <cache name="perSegFilter" class="solr.search.LRUCache" size="10" initialSize="0" autowarmCount="10" regenerator="solr.NoOpRegenerator" />
@@ -469,9 +469,7 @@
          by document id.  The fieldValueCache is created by default
          even if not configured here.
       -->
-    <!--
-       <fieldValueCache class="solr.FastLRUCache" size="512" autowarmCount="128" showItems="32" />
-      -->
+    <fieldValueCache class="solr.FastLRUCache" size="100" initialSize="0" autowarmCount="0" showItems="32" />
 
     <!-- Custom Cache