Added the groups module to create linux groups, renamed disco-linux-ents to entities

balls/groups/requires

@@ -0,0 +1 @@
+entities

balls/groups/scripts/00-makegroups.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+########################
+# 00-makegroups.sh
+#
+# Make linux groups for the 'group' disco ball
+# Each group is represented as a key under ${HOSTNAME}/groups, with the value
+# of each key being a list of groupadd/groupmod compatible command line flags
+# that are passed, one each, directly into groupmod/groupadd
+########################
+
+HOSTNAME=$(hostname)
+
+RETVAL=0
+
+for op in present absent
+do
+    for groupname in $(disco-param keys ${HOSTNAME}/groups/${op})
+    do
+	disco-linux-ents group $groupname $op
+	RETVAL=$(expr $RETVAL + $?)
+    done
+done
+
+exit $RETVAL
+