MCOL-5496: Merge CMAPI code to engine repo.

[add] cmapi code to engine

cmapi/cmapi_server/managers/application.py

@@ -0,0 +1,29 @@
+import logging
+from typing import Optional
+
+from cmapi_server.constants import VERSION_PATH
+
+
+class AppManager:
+    started: bool = False
+    version: Optional[str] = None
+
+    @classmethod
+    def get_version(cls) -> str:
+        """Get CMAPI version.
+
+        :return: cmapi version
+        :rtype: str
+        """
+        if cls.version:
+            return cls.version
+        with open(VERSION_PATH, encoding='utf-8') as version_file:
+            version = '.'.join([
+                i.strip().split('=')[1]
+                for i in version_file.read().splitlines() if i
+            ])
+            if not version:
+                logging.error('Couldn\'t detect version from VERSION file!')
+                version = 'Undefined'
+        cls.version = version
+        return cls.version