Set version to 3.1.0-SNAPSHOT for Gerrit master

Build with Gerrit master and consume its SNAPSHOT
artifact, so that the plugin development can go side-by-side
with the Gerrit development.

Adapt to the latest changes on master, including the
auto value for Project.NameKey.

Change-Id: I98b61de51aabe80528b2dd03e663ad4abeb0af1b

build.sbt

diff --git a/build.sbt b/build.sbt
index 59d1b6a..ba0d2a5 100644
--- a/build.sbt
+++ b/build.sbt
@@ -1,6 +1,6 @@
 enablePlugins(GitVersioning)
 
-val gerritApiVersion = "3.0.0"
+val gerritApiVersion = "3.1.0-SNAPSHOT"
 
 val pluginName = "analytics"
 
@@ -26,7 +26,7 @@
       "joda-time" % "joda-time" % "2.9.9",
 
       "com.google.gerrit" % "gerrit-acceptance-framework" % gerritApiVersion % Test,
-      "org.bouncycastle" % "bcprov-jdk15on" % "1.60" % Test,
+      "org.bouncycastle" % "bcpg-jdk15on" % "1.60" % Test,
       "org.scalatest" %% "scalatest" % "3.0.1" % Test,
       "net.codingwell" %% "scala-guice" % "4.1.0" % Test),
 

src/main/scala/com/googlesource/gerrit/plugins/analytics/common/CommitsStatisticsLoader.scala

diff --git a/src/main/scala/com/googlesource/gerrit/plugins/analytics/common/CommitsStatisticsLoader.scala b/src/main/scala/com/googlesource/gerrit/plugins/analytics/common/CommitsStatisticsLoader.scala
index 1144901..75ac467 100644
--- a/src/main/scala/com/googlesource/gerrit/plugins/analytics/common/CommitsStatisticsLoader.scala
+++ b/src/main/scala/com/googlesource/gerrit/plugins/analytics/common/CommitsStatisticsLoader.scala
@@ -41,7 +41,7 @@
     import RevisionBrowsingSupport._
 
     val objectId = cacheKey.commitId
-    val nameKey = new Project.NameKey(cacheKey.projectName)
+    val nameKey = Project.nameKey(cacheKey.projectName)
     val commentInfoList: Seq[CommentLinkInfo] =
       if(config.isExtractIssues) projectCache.get(nameKey).getCommentLinks.asScala else Seq.empty
     val replacers = commentInfoList.map(info =>