Updating JS unit test coverage threshold

This patch updates the JS unit test coverage threshold.  As we've added
code we've increased the coverage.  To keep new code well-covered, we
should increase the threshold so new code doesn't decrease the overall
coverage.  The rule of thumb is to keep it at the highest whole percentage
point that greater than .5% of a difference from the current coverage.

Change-Id: I89e18841b4e9ba4a2cbd49ee222d3234e9d26c88

horizon/karma.conf.js

@@ -147,10 +147,10 @@ module.exports = function (config) {
 
     // Coverage threshold values.
     thresholdReporter: {
-      statements: 91, // target 100
-      branches: 81, // target 100
-      functions: 90, // target 100
-      lines: 92 // target 100
+      statements: 93, // target 100
+      branches: 84, // target 100
+      functions: 91, // target 100
+      lines: 93 // target 100
     }
   });
 };

openstack_dashboard/karma.conf.js

@@ -192,10 +192,10 @@ module.exports = function (config) {
 
     // Coverage threshold values.
     thresholdReporter: {
-      statements: 95, // target 100
-      branches: 92, // target 100
-      functions: 94, // target 100
-      lines: 95 // target 100
+      statements: 96, // target 100
+      branches: 93, // target 100
+      functions: 95, // target 100
+      lines: 96 // target 100
     }
   });
 };