Bump vmpooler requirement and add install gemfile script

Gemfile.lock

@@ -3,7 +3,7 @@ PATH
   specs:
     vmpooler-provider-vsphere (2.1.0)
       rbvmomi2 (>= 3.1, < 4.0)
-      vmpooler (~> 2.4)
+      vmpooler (~> 3.0)
 
 GEM
   remote: https://rubygems.org/
@@ -14,7 +14,7 @@ GEM
     climate_control (1.2.0)
     coderay (1.1.3)
     concurrent-ruby (1.2.2)
-    connection_pool (2.3.0)
+    connection_pool (2.4.0)
     deep_merge (1.2.2)
     diff-lcs (1.5.0)
     docile (1.4.0)
@@ -146,7 +146,7 @@ GEM
     thrift (0.18.1)
     tilt (2.1.0)
     unicode-display_width (2.4.2)
-    vmpooler (2.4.0)
+    vmpooler (3.0.0)
       concurrent-ruby (~> 1.1)
       connection_pool (~> 2.2)
       deep_merge (~> 1.2)
@@ -172,7 +172,6 @@ GEM
       rspec (~> 3)
 
 PLATFORMS
-  universal-java-1.8
   universal-java-11
 
 DEPENDENCIES
@@ -188,4 +187,4 @@ DEPENDENCIES
   yarjuf (>= 2.0)
 
 BUNDLED WITH
-   2.2.29
+   2.4.10

install-gemfile-lock

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+# The container tag should closely match what is used in `docker/Dockerfile` in vmpooler-deployment
+docker run -it --rm \
+  -v $(pwd):/app \
+  jruby:9.4.1.0-jdk11 \
+  /bin/bash -c 'apt-get update -qq && apt-get install -y --no-install-recommends make git netbase && cd /app && gem install bundler && bundle install --jobs 3; echo "LOCK_FILE_UPDATE_EXIT_CODE=$?"'

vmpooler-provider-vsphere.gemspec

@@ -16,7 +16,7 @@ Gem::Specification.new do |s|
   s.files         = Dir[ "lib/**/*" ]
   s.require_paths = ["lib"]
   s.add_dependency 'rbvmomi2', '>= 3.1', '< 4.0'
-  s.add_dependency 'vmpooler', '~> 2.4'
+  s.add_dependency 'vmpooler', '~> 3.0'
 
   # Testing dependencies
   s.add_development_dependency 'climate_control', '>= 0.2.0'