Shorten the name of the group_agreements cache

It overflowed the column width in show-caches.

Change-Id: I9344c77564b9e6d83a171495c1f940704eaac77a
Signed-off-by: Shawn O. Pearce <sop@google.com>
diff --git a/gerrit-server/src/main/java/com/google/gerrit/server/account/AccountGroupAgreementsCacheImpl.java b/gerrit-server/src/main/java/com/google/gerrit/server/account/AccountGroupAgreementsCacheImpl.java
index 9f5ce62..0f0636a 100644
--- a/gerrit-server/src/main/java/com/google/gerrit/server/account/AccountGroupAgreementsCacheImpl.java
+++ b/gerrit-server/src/main/java/com/google/gerrit/server/account/AccountGroupAgreementsCacheImpl.java
@@ -37,7 +37,7 @@
 @Singleton
 public class AccountGroupAgreementsCacheImpl implements
     AccountGroupAgreementsCache {
-  private static final String BY_GROUP_ID = "account_group_agreements";
+  private static final String BY_GROUP_ID = "group_agreements";
 
   protected static class AccountGroupAgreementList {
     @Column(id = 1)