Add a test with one page per range

Create ranges with one page and try to select from it.

Closes #1778

test/vinyl/page_per_range.result

+#!/usr/bin/env tarantool
+---
+...
+env = require('test_run')
+---
+...
+test_run = env.new()
+---
+...
+page_size = 1024
+---
+...
+space = box.schema.space.create('test', { engine = 'vinyl' })
+---
+...
+pk = space:create_index('primary', { page_size = page_size, range_size = page_size })
+---
+...
+--
+-- gh-1778: Create ranges with one page and try to select from it
+--
+test_run:cmd("setopt delimiter ';'")
+---
+- true
+...
+l = string.rep('a', page_size)
+for i = 0,4 do
+    space:replace({i})
+    box.snapshot()
+end
+test_run:cmd("setopt delimiter ''");
+---
+...
+#space:select()
+---
+- 5
+...
+k = 0
+---
+...
+for _, t in space:select() do k = k + t[1] end
+---
+- error: '[string "for _, t in space:select() do k = k + t[1] end "]:1: attempt to
+    call a table value'
+...
+k
+---
+- 0
+...
+test_run:cmd("setopt delimiter ';'")
+---
+- true
+...
+k = 0;
+---
+...
+for i = 0,4  do
+    t = space:get(i)
+    k = k + t[1]
+end;
+---
+...
+test_run:cmd("setopt delimiter ''");
+---
+- true
+...
+k
+---
+- 10
+...
+space:drop()
+---
+...

test/vinyl/page_per_range.test.lua

+#!/usr/bin/env tarantool
+
+env = require('test_run')
+test_run = env.new()
+
+page_size = 1024
+
+space = box.schema.space.create('test', { engine = 'vinyl' })
+pk = space:create_index('primary', { page_size = page_size, range_size = page_size })
+
+--
+-- gh-1778: Create ranges with one page and try to select from it
+--
+test_run:cmd("setopt delimiter ';'")
+l = string.rep('a', page_size)
+for i = 0,4 do
+    space:replace({i})
+    box.snapshot()
+end
+test_run:cmd("setopt delimiter ''");
+#space:select()
+
+k = 0
+for _, t in space:select() do k = k + t[1] end
+k
+
+test_run:cmd("setopt delimiter ';'")
+k = 0;
+for i = 0,4  do
+    t = space:get(i)
+    k = k + t[1]
+end;
+test_run:cmd("setopt delimiter ''");
+k
+
+space:drop()