Did World War I drive technology or did the technology drive World War I?

World War I drove technology, not the other way around. 
This war was not caused by technology -- it was caused by things like ethnic animosity
and the desire for power among nations.

The major reason
for the start of WWI was ethnic animosity and nationalism.  The killing or Archduke
Franz Ferdinand was done because he was a German ruling over Slavs, not because of
technology.  The war expanded because Russia supported the Serbs and Germany supported
Austria-Hungary.  This was done because of ethnicity, not because of
technology.

The war spread to include England and France
because those two countries were worried about the balance of power in Europe, not
because of technology.

Lots of technology came out of this
war, but the new technologies did not lead to the war.