(POOLER-70) Update fail_pending_vm for VM Provider

Previously the Pool Manager would use vSphere objects directly.  This commit
- Modifies the pool_manager to use the VM provider methods instead
- Modified to return true or false to indicate that the VM was failed

lib/vmpooler/pool_manager.rb

@@ -50,9 +50,9 @@ module Vmpooler
       $logger.log('d', "[!] [#{pool}] '#{vm}' no longer exists. Removing from pending.")
     end
 
-    def fail_pending_vm(vm, pool, timeout, exists=true)
+    def fail_pending_vm(vm, pool, timeout, exists = true)
       clone_stamp = $redis.hget("vmpooler__vm__#{vm}", 'clone')
-      return if ! clone_stamp
+      return true if !clone_stamp
 
       time_since_clone = (Time.now - Time.parse(clone_stamp)) / 60
       if time_since_clone > timeout
@@ -63,8 +63,10 @@ module Vmpooler
           remove_nonexistent_vm(vm, pool)
         end
       end
+      true
     rescue => err
       $logger.log('d', "Fail pending VM failed with an error: #{err}")
+      false
     end
 
     def move_pending_vm_to_ready(vm, pool, host)

spec/unit/pool_manager_spec.rb

@@ -114,19 +114,19 @@ EOT
     end
 
     it 'takes no action if VM is not cloning' do
-      expect(subject.fail_pending_vm(vm, pool, timeout)).to eq(nil)
+      expect(subject.fail_pending_vm(vm, pool, timeout)).to eq(true)
       expect(redis.sismember("vmpooler__pending__#{pool}", vm)).to be(true)
     end
 
     it 'takes no action if VM is within timeout' do
       redis.hset("vmpooler__vm__#{vm}", 'clone',Time.now.to_s)
-      expect(subject.fail_pending_vm(vm, pool, timeout)).to eq(nil)
+      expect(subject.fail_pending_vm(vm, pool, timeout)).to eq(true)
       expect(redis.sismember("vmpooler__pending__#{pool}", vm)).to be(true)
     end
 
     it 'moves VM to completed queue if VM has exceeded timeout and exists' do
       redis.hset("vmpooler__vm__#{vm}", 'clone',Date.new(2001,1,1).to_s)
-      expect(subject.fail_pending_vm(vm, pool, timeout,true)).to eq(nil)
+      expect(subject.fail_pending_vm(vm, pool, timeout,true)).to eq(true)
       expect(redis.sismember("vmpooler__pending__#{pool}", vm)).to be(false)
       expect(redis.sismember("vmpooler__completed__#{pool}", vm)).to be(true)
     end
@@ -134,18 +134,18 @@ EOT
     it 'logs message if VM has exceeded timeout and exists' do
       redis.hset("vmpooler__vm__#{vm}", 'clone',Date.new(2001,1,1).to_s)
       expect(logger).to receive(:log).with('d', "[!] [#{pool}] '#{vm}' marked as 'failed' after #{timeout} minutes")
-      expect(subject.fail_pending_vm(vm, pool, timeout,true)).to eq(nil)
+      expect(subject.fail_pending_vm(vm, pool, timeout,true)).to eq(true)
     end
 
     it 'calls remove_nonexistent_vm if VM has exceeded timeout and does not exist' do
       redis.hset("vmpooler__vm__#{vm}", 'clone',Date.new(2001,1,1).to_s)
       expect(subject).to receive(:remove_nonexistent_vm).with(vm, pool)
-      expect(subject.fail_pending_vm(vm, pool, timeout,false)).to eq(nil)
+      expect(subject.fail_pending_vm(vm, pool, timeout,false)).to eq(true)
     end
 
     it 'swallows error if an error is raised' do
       redis.hset("vmpooler__vm__#{vm}", 'clone','iamnotparsable_asdate')
-      expect(subject.fail_pending_vm(vm, pool, timeout,true)).to eq(nil)
+      expect(subject.fail_pending_vm(vm, pool, timeout,true)).to eq(false)
     end
 
     it 'logs message if an error is raised' do