dependency on liblzo2-2 not specified

[Impact] importing pytables fails due to a missing dependency. The error message is gives no indication of what is missing

[Development Fix] in precise the dependencies of pytables are correctly specified

[Stable Fix] the cause of the error in natty and oneiric is an error in the dh_shlibdeps call which causes shlib:Depends and shlib:Recommends to be not be filled correctly
While the fix is not really necessary for oneiric due to hdf-5 having changed so that the Dependency is really optional, it still missing Recommends and we need to update it to ensure a proper upgrade path.

[Test Case]
have liblzo2-2 *not* installed
apt-get install python-tables
python
import tables

expected result: successful import
result on natty:
ImportError: /usr/lib/python2.7/dist-packages/tables/hdf5Extension.so: undefined symbol: H5T_STD_U8BE_g

[Regression Potential] only dependencies are changed so no regressions are likely
also pytables contains an extensive testsuite, while it is not run during build, it can be executed with:
python /usr/share/pyshared/tables/tests/test_all.py
it passed with the updated packages

original report
When I import tables without liblzo2-2 I get a Traceback:

jvb@weasel:~$ python -c "import tables"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python2.7/dist-packages/tables/__init__.py", line 76, in <module>
    from tables.file import File, openFile, copyFile
  File "/usr/lib/python2.7/dist-packages/tables/file.py", line 43, in <module>
    from tables import hdf5Extension
ImportError: /usr/lib/python2.7/dist-packages/tables/hdf5Extension.so: undefined symbol: H5T_STD_U8BE_g

After installing liblzo2-2 - no traceback:
jvb@weasel:~$ sudo apt-get install liblzo2-2
jvb@weasel:~$ python -c "import tables"

jvb@weasel:~$ lsb_release -rd
Description: Ubuntu 11.04
Release: 11.04

jvb@weasel:~$ apt-cache policy python-tables
python-tables:
  Installed: 2.1.2-3.1build1
  Candidate: 2.1.2-3.1build1
  Version table:
 *** 2.1.2-3.1build1 0
        500 http://gb.archive.ubuntu.com/ubuntu/ natty/universe amd64 Packages
        100 /var/lib/dpkg/status