Fixes test failure from #915 (#918)

This PR caused a test failure, this PR fixes it.

#915
Signed-off-by: Daniel Mikusa <[email protected]>

Author: Daniel Mikusa

spec/java_buildpack/framework/dynatrace_one_agent_spec.rb

@@ -103,7 +103,7 @@
 
         allow(application_cache).to receive(:get)
           .with('test-apiurl/v1/deployment/installer/agent/unix/paas/latest?include=java&bitness=64&' \
-          'Api-Token=test-apitoken&networkzone=test-network-zone')
+          'Api-Token=test-apitoken&networkZone=test-network-zone')
           .and_yield(Pathname.new('spec/fixtures/stub-dynatrace-one-agent.zip').open, false)
       end