Projects: update to atlasexternal 2.1.27

Only change is the removal of the `GAUDI_V20_COMPAT` compiler flag,
which removes previously deprecated Gaudi interface methods.

Projects/AnalysisBase/externals.txt

@@ -6,4 +6,4 @@
 # forbidden.
 
 # The version of atlas/atlasexternals to use:
-AnalysisBaseExternalsVersion = 2.1.26
+AnalysisBaseExternalsVersion = 2.1.27

Projects/AthAnalysis/externals.txt

@@ -6,4 +6,4 @@
 # forbidden.
 
 # The version of atlas/atlasexternals to use:
-AthAnalysisExternalsVersion = 2.1.26
+AthAnalysisExternalsVersion = 2.1.27

Projects/AthGeneration/externals.txt

@@ -6,4 +6,4 @@
 # forbidden.
 
 # The version of atlas/atlasexternals to use:
-AthGenerationExternalsVersion = 2.1.26
+AthGenerationExternalsVersion = 2.1.27

Projects/AthSimulation/externals.txt

@@ -6,4 +6,4 @@
 # forbidden.
 
 # The version of atlas/atlasexternals to use:
-AthSimulationExternalsVersion = 2.1.26
+AthSimulationExternalsVersion = 2.1.27

Projects/Athena/externals.txt

@@ -6,4 +6,4 @@
 # forbidden.
 
 # The version of atlas/atlasexternals to use:
-AthenaExternalsVersion = 2.1.26
+AthenaExternalsVersion = 2.1.27

Projects/DetCommon/externals.txt

@@ -6,4 +6,4 @@
 # forbidden.
 
 # The version of atlas/atlasexternals to use:
-AtlasExternalsVersion = 2.1.26
+AtlasExternalsVersion = 2.1.27

Projects/VP1Light/externals.txt

@@ -6,4 +6,4 @@
 # forbidden.
 
 # The version of atlas/atlasexternals to use:
-VP1LightExternalsVersion = 2.1.26
+VP1LightExternalsVersion = 2.1.27