logical_count: use "_" as separator instead of "@"

Because "@" can't be used in `match_columns`.

plugins/sharding/search.rb

@@ -19,7 +19,7 @@ def run_body(input)
         end
 
         total = 0
-        context.database.each_table do |table|
+        context.database.each_table(:prefix => "#{logical_table}_") do |table|
           total += table.size
         end
         output(total)

test/command/suite/sharding/logical_count/condition/none/multiple_phisical_tables.expected

@@ -1,29 +1,29 @@
 register sharding/search
 [[0,0.0,0.0],true]
-table_create Logs@20150203 TABLE_NO_KEY
+table_create Logs_20150203 TABLE_NO_KEY
 [[0,0.0,0.0],true]
-column_create Logs@20150203 timestamp COLUMN_SCALAR Time
+column_create Logs_20150203 timestamp COLUMN_SCALAR Time
 [[0,0.0,0.0],true]
-table_create Logs@20150204 TABLE_NO_KEY
+table_create Logs_20150204 TABLE_NO_KEY
 [[0,0.0,0.0],true]
-column_create Logs@20150204 timestamp COLUMN_SCALAR Time
+column_create Logs_20150204 timestamp COLUMN_SCALAR Time
 [[0,0.0,0.0],true]
-table_create Logs@20150205 TABLE_NO_KEY
+table_create Logs_20150205 TABLE_NO_KEY
 [[0,0.0,0.0],true]
-column_create Logs@20150205 timestamp COLUMN_SCALAR Time
+column_create Logs_20150205 timestamp COLUMN_SCALAR Time
 [[0,0.0,0.0],true]
-load --table Logs@20150203
+load --table Logs_20150203
 [
 {"timestamp": "2015-02-03 12:49:00"}
 ]
 [[0,0.0,0.0],1]
-load --table Logs@20150204
+load --table Logs_20150204
 [
 {"timestamp": "2015-02-04 13:49:00"},
 {"timestamp": "2015-02-04 13:50:00"}
 ]
 [[0,0.0,0.0],2]
-load --table Logs@20150205
+load --table Logs_20150205
 [
 {"timestamp": "2015-02-05 13:49:00"},
 {"timestamp": "2015-02-05 13:50:00"},

test/command/suite/sharding/logical_count/condition/none/multiple_phisical_tables.test

@@ -2,27 +2,27 @@
 register sharding/search
 #@on-error default
 
-table_create Logs@20150203 TABLE_NO_KEY
-column_create Logs@20150203 timestamp COLUMN_SCALAR Time
+table_create Logs_20150203 TABLE_NO_KEY
+column_create Logs_20150203 timestamp COLUMN_SCALAR Time
 
-table_create Logs@20150204 TABLE_NO_KEY
-column_create Logs@20150204 timestamp COLUMN_SCALAR Time
+table_create Logs_20150204 TABLE_NO_KEY
+column_create Logs_20150204 timestamp COLUMN_SCALAR Time
 
-table_create Logs@20150205 TABLE_NO_KEY
-column_create Logs@20150205 timestamp COLUMN_SCALAR Time
+table_create Logs_20150205 TABLE_NO_KEY
+column_create Logs_20150205 timestamp COLUMN_SCALAR Time
 
-load --table Logs@20150203
+load --table Logs_20150203
 [
 {"timestamp": "2015-02-03 12:49:00"}
 ]
 
-load --table Logs@20150204
+load --table Logs_20150204
 [
 {"timestamp": "2015-02-04 13:49:00"},
 {"timestamp": "2015-02-04 13:50:00"}
 ]
 
-load --table Logs@20150205
+load --table Logs_20150205
 [
 {"timestamp": "2015-02-05 13:49:00"},
 {"timestamp": "2015-02-05 13:50:00"},

test/command/suite/sharding/logical_count/condition/none/one_physical_table.expected

@@ -1,10 +1,10 @@
 register sharding/search
 [[0,0.0,0.0],true]
-table_create Logs@20150203 TABLE_NO_KEY
+table_create Logs_20150203 TABLE_NO_KEY
 [[0,0.0,0.0],true]
-column_create Logs@20150203 timestamp COLUMN_SCALAR Time
+column_create Logs_20150203 timestamp COLUMN_SCALAR Time
 [[0,0.0,0.0],true]
-load --table Logs@20150203
+load --table Logs_20150203
 [
 {"timestamp": "2015-02-03 12:49:00"},
 {"timestamp": "2015-02-03 12:50:00"},

test/command/suite/sharding/logical_count/condition/none/one_physical_table.test

@@ -2,10 +2,10 @@
 register sharding/search
 #@on-error default
 
-table_create Logs@20150203 TABLE_NO_KEY
-column_create Logs@20150203 timestamp COLUMN_SCALAR Time
+table_create Logs_20150203 TABLE_NO_KEY
+column_create Logs_20150203 timestamp COLUMN_SCALAR Time
 
-load --table Logs@20150203
+load --table Logs_20150203
 [
 {"timestamp": "2015-02-03 12:49:00"},
 {"timestamp": "2015-02-03 12:50:00"},