Update version file paths to use VERSION.in (#1642)

**Link the Issue(s) this Pull Request is related to.**
#1637

**Summarize your change.**
- Updated version file paths in setup scripts to use VERSION.in (correct
file name in the Opencue project) instead of VERSION
- Fixes the error when running `sandbox/install-client-sources.sh`
- `sandbox/install-client-sources.sh` calls `pip install pycue/
pyoutline/ cueadmin/ cuesubmit/ cuegui/` and the `setup.py` in these
directories should use `VERSION.in` not `VERSION`

cueadmin/setup.py

@@ -20,8 +20,8 @@
 
 version = 'unknown'
 possible_version_paths = [
-    os.path.join(cueadmin_dir, 'VERSION'),
-    os.path.join(os.path.dirname(cueadmin_dir), 'VERSION'),
+    os.path.join(cueadmin_dir, 'VERSION.in'),
+    os.path.join(os.path.dirname(cueadmin_dir), 'VERSION.in'),
 ]
 for possible_version_path in possible_version_paths:
     if os.path.exists(possible_version_path):

cuegui/setup.py

@@ -20,8 +20,8 @@
 
 version = 'unknown'
 possible_version_paths = [
-    os.path.join(cuegui_dir, 'VERSION'),
-    os.path.join(os.path.dirname(cuegui_dir), 'VERSION'),
+    os.path.join(cuegui_dir, 'VERSION.in'),
+    os.path.join(os.path.dirname(cuegui_dir), 'VERSION.in'),
 ]
 for possible_version_path in possible_version_paths:
     if os.path.exists(possible_version_path):

cuesubmit/setup.py

@@ -20,8 +20,8 @@
 
 version = 'unknown'
 possible_version_paths = [
-    os.path.join(cuesubmit_dir, 'VERSION'),
-    os.path.join(os.path.dirname(cuesubmit_dir), 'VERSION'),
+    os.path.join(cuesubmit_dir, 'VERSION.in'),
+    os.path.join(os.path.dirname(cuesubmit_dir), 'VERSION.in'),
 ]
 for possible_version_path in possible_version_paths:
     if os.path.exists(possible_version_path):

pycue/setup.py

@@ -20,8 +20,8 @@
 
 version = 'unknown'
 possible_version_paths = [
-    os.path.join(pycue_dir, 'VERSION'),
-    os.path.join(os.path.dirname(pycue_dir), 'VERSION'),
+    os.path.join(pycue_dir, 'VERSION.in'),
+    os.path.join(os.path.dirname(pycue_dir), 'VERSION.in'),
 ]
 for possible_version_path in possible_version_paths:
     if os.path.exists(possible_version_path):

pyoutline/setup.py

@@ -20,8 +20,8 @@
 
 version = 'unknown'
 possible_version_paths = [
-    os.path.join(pyoutline_dir, 'VERSION'),
-    os.path.join(os.path.dirname(pyoutline_dir), 'VERSION'),
+    os.path.join(pyoutline_dir, 'VERSION.in'),
+    os.path.join(os.path.dirname(pyoutline_dir), 'VERSION.in'),
 ]
 for possible_version_path in possible_version_paths:
     if os.path.exists(possible_version_path):

rqd/setup.py

@@ -20,8 +20,8 @@
 
 version = 'unknown'
 possible_version_paths = [
-    os.path.join(rqd_dir, 'VERSION'),
-    os.path.join(os.path.dirname(rqd_dir), 'VERSION'),
+    os.path.join(rqd_dir, 'VERSION.in'),
+    os.path.join(os.path.dirname(rqd_dir), 'VERSION.in'),
 ]
 for possible_version_path in possible_version_paths:
     if os.path.exists(possible_version_path):