Update bStats Metrics class to 1.8 (#3845)

Replace modified bStats Metrics 1.7 class with official 1.8 artifact. 1.8 adds random submit intervals and changes the way submissions are scheduled, and our custom modifications are no longer needed as we now use the plugin ID.

Author: mdcfe

Essentials/build.gradle

@@ -6,6 +6,8 @@ dependencies {
 
     api 'io.papermc:paperlib:1.0.6'
 
+    api 'org.bstats:bstats-bukkit:1.8'
+
     // Providers
     api project(':providers:BaseProviders')
     api project(':providers:PaperProvider')
@@ -20,10 +22,12 @@ dependencies {
 shadowJar {
     dependencies {
         include (dependency('io.papermc:paperlib'))
+        include (dependency('org.bstats:bstats-bukkit'))
         include (project(':providers:BaseProviders'))
         include (project(':providers:PaperProvider'))
         include (project(':providers:NMSReflectionProvider'))
         include (project(':providers:1_8Provider'))
     }
     relocate 'io.papermc.lib', 'com.earth2me.essentials.paperlib'
+    relocate 'org.bstats.bukkit', 'com.earth2me.essentials.metrics'
 }