.read_sql_query works but .read_sql_table fails
Pandas is very helpful and I have been using it heavily recently. However, I have run into an issue where this code works:

```
from sqlalchemy import *
import pandas as pd
orcl_connect_string = 'oracle+cx_oracle://system:oracle@192.168.56.101:1521/?service_name=orcl'
engine = create_engine(orcl_connect_string)
pd.read_sql_query('SELECT * FROM INT_PROP', engine)
```

but this code fails:

```
from sqlalchemy import *
import pandas as pd
orcl_connect_string = 'oracle+cx_oracle://system:oracle@192.168.56.101:1521/?service_name=orcl'
engine = create_engine(orcl_connect_string)
read_sql_table('INT_PROP', engine)
```

Error message I get back:

```
/System/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7 "/Users/me/Google Drive/Me Projects/Pycharm/auto-profiler/profile_pandas.py"
Traceback (most recent call last):
  File "/Users/me/Google Drive/Me Projects/Pycharm/auto-profiler/profile_pandas.py", line 13, in <module>
    df = pd.read_sql_table(table_name_str, engine)
  File "/Library/Python/2.7/site-packages/pandas/io/sql.py", line 340, in read_sql_table
    raise ValueError("Table %s not found" % table_name)
ValueError: Table INT_PROP not found
```

I can't think of any other extenuating circumstances -- it's a table, not a view, the userid logging in has full rights to the table in question. I've also tried adding the schema name and I get the same error back.

Versions:

```
Mac OS X 10.11 El Capitan (recently upgraded but had the same issue on 10.10 Yosemite)
Oracle 12c
Python 2.7.6
SQLAlchemy 1.0.8
Pandas 0.16.2
```

Problem occurs whether running from within Pycharm CE or running at the terminal console with python.
