Refactor mantis-examples-twitter-sample 3rd party dependency specific…

…ations

first pass at refactor 3rd party dependency specifications for mantis-examples-twitter-sample and corresponding changes to root build.gradle (issue Netflix#345)

build.gradle

@@ -51,7 +51,7 @@ ext.versions = [
         guiceServletVersion : '4.0',
         hadoop   : "2.7.7",
         hdrHistogramVersion : '2.+',
-        httpComponentsVersion : '4.5.6',
+        httpComponentsVersion : '4.5.9',
         icebergVersion : "0.14.+",
         jacksonVersion : '2.12.+',
         jctoolsVersion : "1.+",
@@ -130,6 +130,7 @@ ext.libraries = [
         hadoopS3       : "org.apache.hadoop:hadoop-aws:${versions.hadoop}",
         hamcrest       : "org.hamcrest:hamcrest-core:1.3",
         hamcrestAll    : "org.hamcrest:hamcrest-all:1.3",
+        hbcCore        : "com.twitter:hbc-core:2.2.0",
         hdrHistogram   : "org.hdrhistogram:HdrHistogram:${versions.hdrHistogramVersion}",
         httpClient     : "org.apache.httpcomponents:httpclient:${versions.httpComponentsVersion}",
         iceberg        : [

mantis-examples/mantis-examples-twitter-sample/build.gradle

@@ -2,8 +2,8 @@ apply plugin: 'java-library'
 
 configurations.all {
     resolutionStrategy {
-        force "com.google.guava:guava:31.1-jre"
-        force "org.apache.httpcomponents:httpclient:4.5.9"
+        force libraries.guava
+        force libraries.httpClient
     }
 }
 
@@ -15,8 +15,8 @@ task execute(type: JavaExec) {
 
 dependencies {
     implementation project(':mantis-runtime')
-    implementation "com.netflix.spectator:spectator-api:1.3.+"
-    implementation 'com.twitter:hbc-core:2.2.0'
+    implementation libraries.spectatorApi
+    implementation libraries.hbcCore
 
     implementation libraries.slf4jApi
     implementation libraries.slf4jLog4j12