Reduced load in elastic, tet4 CI-setting.

cont/elastic/plane_waves/tet4_reg.xml

@@ -31,9 +31,9 @@
   <cfr>
     <mesh>
       <n_elements>
-        <x>10</x>
-        <y>10</y>
-        <z>10</z>
+        <x>6</x>
+        <y>6</y>
+        <z>6</z>
       </n_elements>
       <size>
         <x>100</x>
@@ -108,7 +108,7 @@
         ]]>
       </initial_values>
 
-      <end_time>24.8</end_time>
+      <end_time>14.8</end_time>
     </setups>
 
     <output>