Factor out common modules from Reindex

As far as programs go, Reindex has about the most complicated
injection stack. This will be useful for future programs, for example
a Reindex analogue for notedb, so move them to the util package.

Change-Id: I7f980c0918b6893e4d421f0ba8a12e96bb01d20d

gerrit-pgm/BUCK

@@ -61,8 +61,11 @@ java_library(
   name = 'util',
   srcs = glob([SRCS + 'util/*.java']),
   deps = [
+    '//gerrit-cache-h2:cache-h2',
+    '//gerrit-common:client',
     '//gerrit-common:server',
     '//gerrit-extension-api:api',
+    '//gerrit-reviewdb:server',
     '//gerrit-server:server',
     '//gerrit-util-cli:cli',
     '//lib:args4j',