Fixed T50811: 'bam' command cannot import name 'main'

The 'bam' CLI command entry point was pointing to the wrong module. This is
now fixed.

setup.py

@@ -44,9 +44,8 @@ setup(
         },
     entry_points={
         'console_scripts': [
-            'bam = bam:main',
+            'bam = bam.cli:main',
         ],
     },
     install_requires=requires,
 )
-