binman: Move to absolute imports

At present binman sets the python path on startup so that it can access
the libraries it needs. If we convert to use absolute imports this is not
necessary.

Move binman to use absolute imports. This enables removable of the path
adjusting in Entry also.

Signed-off-by: Simon Glass <sjg@chromium.org>

tools/binman/main.py

@@ -20,8 +20,8 @@ import unittest
 # Bring in the patman and dtoc libraries (but don't override the first path
 # in PYTHONPATH)
 our_path = os.path.dirname(os.path.realpath(__file__))
-for dirname in ['../patman', '../dtoc', '..', '../concurrencytest']:
-    sys.path.insert(2, os.path.join(our_path, dirname))
+for dirname in ['../patman', '../dtoc', '../concurrencytest', '..']:
+    sys.path.insert(2, os.path.realpath(os.path.join(our_path, dirname)))
 
 # Bring in the libfdt module
 sys.path.insert(2, 'scripts/dtc/pylibfdt')
@@ -34,9 +34,8 @@ sys.path.insert(2, os.path.join(our_path,
 # that is not available in a virtualenv.
 sys.path.append(get_python_lib())
 
-import cmdline
-import command
-import control
+from binman import cmdline
+from binman import control
 import test_util
 
 def RunTests(debug, verbosity, processes, test_preserve_dirs, args, toolpath):
@@ -55,13 +54,13 @@ def RunTests(debug, verbosity, processes, test_preserve_dirs, args, toolpath):
             name to execute (as in 'binman test testSections', for example)
         toolpath: List of paths to use for tools
     """
-    import cbfs_util_test
-    import elf_test
-    import entry_test
-    import fdt_test
-    import ftest
-    import image_test
-    import test
+    from binman import cbfs_util_test
+    from binman import elf_test
+    from binman import entry_test
+    from binman import fdt_test
+    from binman import ftest
+    from binman import image_test
+    from binman import test
     import doctest
 
     result = unittest.TestResult()